An LED lighting system with adjustable light output

Abstract

This invention discloses an LED lighting system with adjustable light output. The system includes a power supply module and multiple LED luminaire components connected in parallel via connecting cables. Each component contains a luminaire-level power supply module. This module is configured to adjust the light output of the corresponding component according to adjustment commands carried in the bus voltage of the connecting cables. The adjustment commands include: a light output parameter type command, used to allow the luminaire-level power supply module to identify the target light output parameter type and enter the corresponding control mode; and a light output parameter control command, used to adjust the target parameter according to the command within the identified control mode. This invention aims to achieve effective adjustment and control of the light output of an LED lighting system.

Description

Technical Field

[0001] This invention relates to the field of LED lighting, and more particularly to an LED lighting system with adjustable light output. Background Technology

[0002] LED lighting systems are widely used in various fields. In applications such as large-scale greenhouses or other plant lighting, a single LED lighting system often involves cascading a large number of luminaires. To reduce costs and improve maintainability, these lighting systems typically employ a centralized power supply.

[0003] like Figure 1 A schematic diagram of an existing LED lighting system is shown. This existing centralized power supply LED lighting system includes a centralized power supply module 90, a control module 91, and distributed luminaires 92. The distributed luminaires 92 comprise multiple luminaires 921. The output of the centralized power supply module 90 is transmitted via bus cables 931 laid along the arrangement path of the luminaires 921. Branch nodes are set at the locations of each luminaire 921, and are electrically connected to the corresponding luminaires 921 via branch cables 932, forming a parallel power supply network structure for multiple luminaires 921.

[0004] To enable synchronized dimming, color temperature adjustment, and spectrum adjustment of multiple 921 lamps, one method is as follows: Figure 1 The diagram shows a wired dimming control method. The control module 91 is connected to each luminaire 921 via a dimming cable 94, and control signals are transmitted through the dimming cable 94. However, this method suffers from problems such as complex installation, numerous wiring connections, high cable and installation costs, and high maintenance costs. Another method is wireless dimming control. Common wireless control methods include Bluetooth, Wi-Fi, and Zigbee. While wireless control solves the problem of complex wiring, in large lighting venues, there are often issues with large coverage areas and diverse equipment types, leading to various interferences and resulting in poor reliability of wireless communication. Furthermore, the coverage range of each wireless node is limited, necessitating multiple nodes for the entire lighting system. Summary of the Invention

[0005] The purpose of this invention is to provide an LED lighting system with adjustable light output, which can solve at least one problem existing in the prior art.

[0006] An LED lighting system with adjustable light output to achieve the aforementioned objectives includes: Multiple LED lighting components, each of which includes a lighting-grade power module; and A power module, wherein the plurality of LED lighting components are connected to the power module in parallel via connecting cables; Each of the lamp-grade power modules is configured to adjust the light output of the corresponding LED lamp component according to the adjustment command carried in the bus voltage of the connecting cable; The adjustment instructions include: The light output parameter type instruction allows the lamp-level power module to identify the type of the target light output parameter and control it to enter the corresponding light output control mode. The light output parameter control command corresponds to the type of the target light output parameter. Under the identified control mode, the lamp-level power module adjusts the target light output parameter according to the light output parameter control command.

[0007] In one or more embodiments, the light output parameter type instruction includes information on the duration of the bus voltage exceeding a preset threshold, and the lamp-grade power module determines the target light output parameter type by identifying the duration of the bus voltage exceeding the preset threshold.

[0008] In one or more embodiments, the retention duration information is obtained by identification within a preset time period.

[0009] In one or more embodiments, the light output parameter control command includes a preset voltage range corresponding to the type of the target light output parameter, and bus voltage information within the preset voltage range. The lamp-level power supply module is configured with a control function established based on the relationship between each target light output parameter and the bus voltage information. The lamp-level power supply module adjusts the target light output parameter based on the bus voltage information according to the control function.

[0010] In one or more embodiments, the luminaire-grade power supply module is further configured to return to the initial state after completing one light output parameter adjustment, in order to wait for the next adjustment command.

[0011] In one or more embodiments, the light output parameters include at least one of the following: spectrum, light intensity, and color temperature.

[0012] In one or more embodiments, a controller is further included, the controller being electrically connected to the power module and configured to output a control signal to the power module so that the power module adjusts the regulation command in the bus voltage according to the control signal.

[0013] In one or more embodiments, the connecting cable includes a bus cable and branch cables. The output of the power module is transmitted through the bus cable laid on the arrangement path of the LED lighting components, and branch nodes are set at the positions of each LED lighting component, and the branch cables are wired to the corresponding LED lighting components.

[0014] In one or more embodiments, the luminaire-grade power supply module includes: The constant voltage to constant current module is used to convert the high voltage DC voltage of the bus cable into a constant current to drive LED lighting components; Bus voltage acquisition module, used to acquire the bus voltage; and The control module is used to adjust the light output of the corresponding LED lighting component according to the adjustment command.

[0015] In one or more embodiments, the bus voltage acquisition module includes a resistor voltage divider circuit and a filter circuit. The bus voltage is divided by the resistor voltage divider circuit and filtered by the filter circuit before being input to the control module.

[0016] The beneficial effects of this invention are as follows: This disclosed LED lighting system utilizes bus voltage to carry regulation commands, enabling each LED luminaire component to identify and adjust light output parameters without additional communication lines or independent control interfaces, significantly simplifying the system wiring structure and control architecture. Simultaneously, by distinguishing between light output parameter type commands and light output parameter control commands, the luminaire-level power supply module can first identify the regulation target and then execute targeted adjustment operations, thereby improving the clarity of the regulation logic and the reliability of the system. Furthermore, this solution is suitable for centralized power supply scenarios with multiple luminaires connected in parallel, exhibiting good scalability and consistency. It is particularly suitable for large-scale greenhouses, plant factories, and other lighting systems requiring precise control of LED light output while necessitating simplified wiring and cost savings.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic diagram of an existing LED lighting system is shown; Figure 2 Schematic diagrams of some embodiments of the LED lighting system with adjustable light output are shown; Figure 3 A schematic diagram of the structure according to some embodiments of this luminaire-grade power supply module is shown. Detailed Implementation

[0019] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0021] To address the problems existing in current LED lighting systems, according to some embodiments of the present invention, an LED lighting system with adjustable light output is provided, which features simple structure, stability and low cost.

[0022] like Figure 2 The diagram illustrates some embodiments of an adjustable LED lighting system according to the present invention. The LED lighting system includes multiple LED luminaire components 1 and a power supply module 2. Each LED luminaire component 1 includes a luminaire-level power supply module 10. The multiple LED luminaire components 1 are connected in parallel to the power supply module 2 via connecting cables 4, as shown in the figure, forming a structure in which a single power supply module 2 provides centralized power supply.

[0023] Each luminaire-level power module 10 is configured to adjust the light output of the corresponding LED luminaire assembly 1 according to the adjustment command carried in the bus voltage of the connecting cable 4. The adjustment command includes a light output parameter type command and a light output parameter control command. By identifying the acquired light output parameter type command, the luminaire-level power module 10 can determine the type of the target light output parameter to be adjusted, thereby controlling the LED luminaire assembly 1 to enter the corresponding light output control mode. The light output parameter control command is configured to correspond to the type of the target light output parameter. That is, different light output parameter control commands are configured for different target light output parameter types. Under the identified control mode, the luminaire-level power module 10 adjusts the target light output parameter of the LED luminaire assembly 1 according to the light output parameter control command.

[0024] In this disclosure, light output parameters refer to parameters characterizing the light-emitting characteristics of LED lamps. For example, in a specific embodiment, light output parameters include at least one of spectrum, light intensity, and color temperature. A light output parameter type instruction refers to instruction information used to indicate the type of light output parameter to be adjusted. The lamp-level power supply module 10 identifies the target light output parameter type based on this instruction, thereby determining the corresponding light output control mode to enter. A light output parameter control instruction refers to instruction information used to specifically adjust the light output parameter when the light output parameter type has been determined. The adjustment instructions are carried in the form of bus voltage in the connecting cable 4 and are detected and parsed by the lamp-level power supply module 10.

[0025] Through the above technical solution, the LED lighting system disclosed herein utilizes bus voltage to carry adjustment commands, enabling each LED luminaire component 1 to identify and adjust light output parameters without additional communication lines or independent control interfaces, significantly simplifying the system wiring structure and control architecture. Simultaneously, by distinguishing between light output parameter type commands and light output parameter control commands, the luminaire-level power supply module 10 can first identify the control target and then execute targeted adjustment operations, thereby improving the clarity of the adjustment logic and the reliability of the system. Furthermore, this solution is suitable for centralized power supply scenarios with multiple luminaires connected in parallel, exhibiting good scalability and consistency, and is particularly suitable for large-scale greenhouses, plant factories, and other lighting systems that require precise control of LED light output and necessitate simplified wiring and cost savings.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] According to one or more embodiments of this LED lighting system, the light output parameter type instruction includes information on the duration of the hold time after the bus voltage exceeds a preset threshold. The luminaire-level power supply module 10 is configured to continuously detect the bus voltage in the connecting cable 4 during operation. When the bus voltage exceeds the preset threshold, the duration of the bus voltage exceeding the threshold is timed, and the target light output parameter type is determined based on the acquired hold time information, thereby entering the light output control mode corresponding to the target light output parameter type. The preset threshold is a voltage reference value used to determine whether the bus voltage enters the control identification state; this threshold can be set according to system design requirements. The hold time refers to the duration for which the bus voltage is continuously higher than the preset threshold, used to characterize the type information in the control instruction. By incorporating the hold time as a component of the light output parameter type instruction, different hold times correspond to different light output parameter types, thereby achieving parameter type identification based on time characteristics.

[0028] By identifying the duration of hold time after the bus voltage exceeds a preset threshold, different types of light output parameters can be distinguished within the same bus voltage channel. This eliminates the need for additional communication lines or independent control signals, effectively improving the multiplexing capability of control commands. This allows the LED lighting system to support flexible switching and control of multiple light output parameters while maintaining a simple hardware structure. Furthermore, the type identification method based on hold time has strong anti-interference capabilities, contributing to improved stability and reliability of the light output control process, making it particularly suitable for centralized power supply lighting systems with multiple lamps connected in parallel.

[0029] Furthermore, according to one or more embodiments of this LED lighting system, the luminaire-level power supply module 10 is configured to detect whether the bus voltage exceeds a preset threshold within a preset time period, and to identify the duration for which the bus voltage exceeds the preset threshold within the preset time period, thereby obtaining hold duration information for determining the target light output parameter type. By limiting the identification process of the hold duration to be completed within the preset time period, the luminaire-level power supply module 10 can complete the parsing of the adjustment command within a clear time window and enter the corresponding light output control mode accordingly. The preset time period refers to the time window used to perform bus voltage detection and hold duration identification, the length of which can be set according to the system response speed and control requirements. The hold duration information refers to the length of time during which the bus voltage is continuously higher than the preset threshold within the preset time period, serving as an important component of the light output parameter type command. By identifying within the preset time period, misjudgment of instantaneous voltage fluctuations or non-continuous signals can be avoided.

[0030] By limiting the duration of the identification process and completing it within a preset time period, the accuracy and stability of light output parameter type identification are effectively improved. This avoids false triggering caused by short-term voltage interference or transient fluctuations, enabling the lamp-level power module 10 to reliably distinguish different adjustment command types in complex power supply environments, thereby ensuring the reliability of subsequent light output control mode switching. Furthermore, this embodiment further improves the recognizability of bus voltage carrying adjustment commands and the overall anti-interference capability of the system without increasing hardware structural complexity, making it suitable for centralized power supply lighting systems with multiple lamps connected in parallel.

[0031] According to one or more embodiments of this LED lighting system, the light output parameter control command further includes a preset voltage range corresponding to the target light output parameter type, and bus voltage magnitude information within the preset voltage range. The luminaire-level power supply module 10 is pre-configured with control functions established for different target light output parameter types, used to characterize the adjustment relationship between bus voltage information and the corresponding light output parameter. After identifying the target light output parameter type and entering the corresponding light output control mode, the luminaire-level power supply module 10 adjusts the target light output parameter based on the detected bus voltage magnitude information and the control function, thereby achieving continuous or graded changes in the light output parameter within the corresponding adjustment range. The control function refers to a mapping function used to describe the correspondence between bus voltage magnitude information and the target light output parameter. In some specific embodiments, this function can be in the form of a linear relationship, a piecewise function, or a lookup table, used to realize the conversion from bus voltage change to light output parameter change.

[0032] By combining a preset voltage range with a control function, the precise mapping control of the bus voltage information to the optical output parameters is achieved, making the optical output adjustment process smoother, more controllable, and more consistent.

[0033] According to one or more embodiments of this LED lighting system, the luminaire-level power supply module 10 is further configured to automatically return to its initial state after completing one light output parameter adjustment, in order to wait for and respond to the next adjustment command. The initial state refers to the working state in which the luminaire-level power supply module 10 has not entered any light output control mode and is waiting for the recognition of the adjustment command. By automatically returning to the initial state after completing the adjustment, the problem of long-term occupation or false triggering of the control mode is avoided, and the reliability of the system's response to continuous adjustment commands is improved.

[0034] According to one or more embodiments of this LED lighting system, the system further includes a controller 3, which is electrically connected to the power supply module 2. The controller 3 outputs control signals to the power supply module 2, causing it to adjust the bus voltage according to the control signals, thereby carrying corresponding adjustment commands within the bus voltage. The electrical connection refers to a wired connection or a wireless (electrical signal) connection between the controller 3 and the power supply module 2, as shown in the figure. By introducing a collaborative working mechanism between the controller 3 and the power supply module 2, adjustment commands can be uniformly transmitted and distributed through the bus voltage, simplifying the system communication structure and improving the overall scalability and stability in scenarios with centralized power supply and multiple parallel lamps. This is particularly suitable for large-scale plant lighting or greenhouse lighting systems requiring unified dimming control. In some specific embodiments, the power supply module 2 has an adjustable output control signal input interface, which can be a digital interface, such as RS232 / RS485, UART, MODBUS, SPI, IIC, etc., or an analog interface, such as 0-10V. The input interface can be one or multiple channels, and the output voltage amplitude is adjusted by inputting control signals from the controller 3.

[0035] According to one or more embodiments of this LED lighting system, the connecting cable 4 in this LED lighting system further includes a bus cable 41 and branch cables 42. The output of the power module 2 is transmitted along the arrangement path of the LED luminaire 1 through the bus cable 41, and branch nodes are set at the installation positions of each LED luminaire 1. The corresponding branch cables 42 are used to achieve wired electrical connection with each LED luminaire 1, thereby forming a parallel power supply bus structure. Among them, the bus cable 41 refers to the main power supply cable that extends along the arrangement path of multiple LED luminaire 1 and is used to centrally transmit the output power and adjustment commands of the power module 2. The branch cable 42 refers to the branch cable that branches out from the bus cable 41 and is used to achieve electrical connection with a single LED luminaire 1. By adopting a parallel power supply structure combining the bus cable 41 and the branch cable 42, the power module 2 realizes centralized power supply and unified control of multiple luminaire assemblies, reducing the number of wiring and system complexity, and is particularly suitable for application scenarios with a large number of luminaires and long arrangement distances.

[0036] Furthermore, according to one or more embodiments of this LED lighting system, each LED luminaire assembly 1 is provided with a luminaire-level power supply module 10. Figure 3A schematic diagram of the structure of some embodiments of the lighting-grade power supply module is shown. The lighting-grade power supply module 10 includes a constant voltage to constant current module 101, a bus voltage acquisition module 102, and a control module 103. The constant voltage to constant current module 101 is a power conversion circuit that converts high-voltage DC constant voltage power into a constant drive current to meet the stable current drive requirements of the LED load. The bus voltage acquisition module 102 is a circuit structure used to acquire the bus voltage magnitude and convert it into a signal recognizable by the control module 103. Under operating conditions, the constant voltage to constant current module 101 is used to convert the high-voltage DC voltage transmitted on the bus cable 41 into a constant current suitable for driving the LED lighting assembly 1. The bus voltage acquisition module 102 is used to acquire the bus voltage in real time, and the control module 103 is used to adjust the light output of the corresponding LED lighting assembly 1 according to the adjustment command carried in the bus voltage. The constant voltage to constant current module 101 and the bus voltage acquisition module 102 are integrated into the lighting-grade power supply module 10. This allows each LED lighting component 1 to independently identify the adjustment command in the bus voltage and execute the corresponding light output adjustment while ensuring driving stability, thus improving the system's reliability and consistency. In the embodiment shown in the figure, the constant voltage to constant current module 101 is implemented using a buck power supply topology. In other suitable embodiments, the constant voltage to constant current module 101 is implemented using common switching power supply topologies such as boost, buck, and buck-boost. In some specific embodiments, the control module 103 can be composed of programmable logic controllers such as microcontrollers and FPGAs, or analog discrete devices such as operational amplifiers. The operation of the control module 103 depends on a specified control logic algorithm or protocol.

[0037] Furthermore, according to one or more embodiments of this LED lighting system, the bus voltage acquisition module 102 includes a resistor divider circuit and a filter circuit. The bus voltage is proportionally divided by the resistor divider circuit and then smoothed by the filter circuit. The processed voltage signal is input to the control module 103 for subsequent adjustment command recognition and light output control. The resistor divider circuit and the filter circuit are used for voltage amplitude matching and signal stabilization, respectively. By incorporating a resistor divider and filter circuit in the bus voltage acquisition module 102, the safety and stability of the voltage sampling signal are effectively improved, and the impact of noise interference on adjustment command recognition is reduced, thereby further improving the light output adjustment accuracy and the overall system operational stability.

[0038] The present invention will be further illustrated by the following specific embodiment: In this specific embodiment, a particular application method of an LED lighting system that achieves dimming and spectrum adjustment control based on bus voltage changes is provided. The system includes a power supply module 2, a controller 3, and multiple LED luminaire components 1 connected in parallel. The power supply module 2 receives three-phase AC input and outputs 400Vdc. Each LED luminaire component 1 is equipped with a luminaire-level power supply module 10, which includes a bus voltage acquisition module 102 and a control module 103, used to acquire the bus voltage and perform corresponding light output adjustment. In this embodiment, the bus voltage is segmented. The 300V–350V range is designated as the light intensity modulation control range, and the 350V–400V range as the spectral adjustment control range. Simultaneously, a control start signal for spectral adjustment is set as the bus voltage exceeding a preset high voltage threshold of 420V and remaining there for approximately 100ms–120ms. A control start signal for light intensity modulation is also set as the bus voltage exceeding the preset high voltage threshold of 420V and remaining there for 200ms–220ms. The control start signal for different adjustment commands is determined by detecting the duration for which the bus voltage exceeds the preset high voltage threshold of 420V within a preset time period of 250ms.

[0039] In the spectrum adjustment mode, when the bus voltage is within the preset spectrum adjustment range of 350V to 400V and changes, the control module 103 adjusts the output spectrum of the LED lighting assembly 1 according to the control function established between the bus voltage magnitude and the preset spectrum output. Specifically, the change of the bus voltage within the above range corresponds to the continuous change of the output spectrum of the LED lighting assembly 1 within the range of R4 to R9.

[0040] After the spectral adjustment operation is completed, the control module 103 exits the spectral adjustment mode and returns to the initial state to wait for the next adjustment command to be triggered.

[0041] In dimming mode, when the bus voltage is within the preset brightness adjustment range of 300V to 350V and changes, the control module 103 adjusts the output brightness of the LED lighting assembly 1 according to the control function established between the bus voltage magnitude and the brightness output. Specifically, changes in the bus voltage within the brightness adjustment range correspond to continuous adjustment of the output brightness of the LED lighting assembly 1 within the range of 0% to 100%.

[0042] In this embodiment, the bus voltage is regulated by the control signal output from the lighting controller to the control interface of the centralized power supply, causing the power module 2 to output a corresponding voltage, thus carrying the corresponding regulation command within the bus voltage. Each LED lighting component 1 achieves spectrum or brightness adjustment by independently acquiring and analyzing the bus voltage, without the need for additional data communication lines. This realizes LED lighting control that simultaneously carries power supply and regulation command functions using the bus voltage, resulting in a simple structure and low wiring cost.

[0043] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An LED lighting system with adjustable light output, characterized in that, include: Multiple LED lighting components, each of which includes a lighting-grade power module; as well as A power module, wherein the plurality of LED lighting components are connected to the power module in parallel via connecting cables; Each of the lamp-grade power modules is configured to adjust the light output of the corresponding LED lamp component according to the adjustment command carried in the bus voltage of the connecting cable; The adjustment instructions include: The light output parameter type instruction allows the lamp-level power module to identify the type of the target light output parameter and control it to enter the corresponding light output control mode. The light output parameter control command corresponds to the type of the target light output parameter. Under the identified control mode, the lamp-level power module adjusts the target light output parameter according to the light output parameter control command.

2. The LED lighting system with adjustable light output as described in claim 1, characterized in that, The light output parameter type instruction includes information on the duration of the hold after the bus voltage exceeds a preset threshold. The lamp-grade power module determines the target light output parameter type by identifying the duration of the hold after the bus voltage exceeds the preset threshold.

3. The LED lighting system with adjustable light output as described in claim 2, characterized in that, The retention duration information is obtained by identifying the data within a preset time period.

4. The LED lighting system with adjustable light output as described in claim 1, characterized in that, The light output parameter control command includes a preset voltage range corresponding to the type of the target light output parameter, and bus voltage information within the preset voltage range. The lamp-level power supply module is configured with a control function established based on the relationship between each target light output parameter and the bus voltage information. The lamp-level power supply module adjusts the target light output parameter based on the bus voltage information according to the control function.

5. The LED lighting system with adjustable light output as described in claim 1, characterized in that, The lamp-grade power supply module is further configured to return to the initial state after completing one adjustment of the light output parameters, in order to wait for the next adjustment command.

6. The LED lighting system with adjustable light output as described in claim 1, characterized in that, The light output parameters include at least one of the following: spectrum, light intensity, and color temperature.

7. The LED lighting system with adjustable light output as described in claim 1, characterized in that, It also includes a controller, which is electrically connected to the power module and is used to output a control signal to the power module so that the power module adjusts the regulation command in the bus voltage according to the control signal.

8. The LED lighting system with adjustable light output as described in claim 1, characterized in that, The connecting cables include bus cables and branch cables. The output of the power module is transmitted through the bus cables laid on the arrangement path of the LED lighting components, and branch nodes are set at the positions of each LED lighting component, which are wiredly connected to the corresponding LED lighting components through the branch cables.

9. The LED lighting system with adjustable light output as described in claim 8, characterized in that, The lighting-grade power supply module includes: The constant voltage to constant current module is used to convert the high voltage DC voltage of the bus cable into a constant current to drive LED lighting components; Bus voltage acquisition module, used to acquire the bus voltage; and The control module is used to adjust the light output of the corresponding LED lighting component according to the adjustment command.

10. The LED lighting system with adjustable light output as described in claim 9, characterized in that, The bus voltage acquisition module includes a resistor voltage divider circuit and a filter circuit. The bus voltage is divided by the resistor voltage divider circuit and filtered by the filter circuit before being input to the control module.

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