Multi-tiered LED Lighting System Pole Moment Reduction
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Solution Overview
Problem
Conventional outdoor luminaires struggle with uneven lighting coverage and high costs due to the inefficiency of traditional light sources and robust, expensive poles required to withstand environmental forces.
Innovation Solution
A multi-tiered lighting system with LED-based light sources mounted at different heights on a pole, distributing light coverage more uniformly and reducing the structural and financial burden by dividing lumen output and mass across multiple, smaller light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single high-intensity light source is mounted at the top of the pole to illuminate longer distances, then the illumination coverage area is increased, but the lighting uniformity deteriorates due to the inverse square law causing excessive light intensity variation across different angles
Solution Approach 1:
The single high-intensity light source is divided into multiple separate light sources (e.g., three LED modules) positioned at different heights on the pole. Each light source covers a specific angular range, with the combined effect providing uniform illumination across the entire coverage area while eliminating the intensity variation problem of a single source
2Area of stationary object
If a single high-lumen output light source is used to cover the target area, then the illumination coverage is achieved, but the mass and moment applied to the pole increase significantly
Solution Approach 1:
The total lumen output requirement is segmented across multiple smaller light sources positioned at different heights. This distributes the mass away from the pole top, significantly reducing the moment applied to the pole structure while maintaining the required illumination coverage area
3Power
If conventional metal halide or high-pressure sodium light sources are used, then high lumen output is achieved, but color rendering capability and energy efficiency deteriorate
Solution Approach 1:
The patent transitions from conventional light sources (metal halide, high-pressure sodium) to LED technology, changing the fundamental operating parameters. LEDs provide equivalent or superior lumen output with significantly improved energy efficiency and color rendering capability, eliminating the trade-off present in conventional sources
4Area of stationary object
If conventional light sources are used to project light at higher angles, then coverage of extended areas is attempted, but the light intensity capability deteriorates due to the inverse square law
Solution Approach 1:
Instead of relying on a single light source to project light at all angles, the patent distributes light sources across multiple vertical dimensions (heights). This dimensional distribution allows each source to optimize for specific angular ranges, achieving uniform illumination at both low and high angles without the intensity penalties of the inverse square law
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The multi-tiered system achieves more uniform illumination and significantly reduces the moment applied to the pole, leading to cost-effective and efficient lighting with improved color rendering and longer-lasting LED sources.
Implementation Method 1
The first and second light sources may be LED-based light sources, which are designed to provide white light at a desired intensity, color temperature, and color rendering capability
Data Source
AI summary
The present disclosure relates to a multi-tiered lighting system that has a pole and at least two light sources. A first light source is mounted to the pole at a first height, and a second light source is mounted to the pole at a second height that is substantially different than the first height. The first light source is configured to project a first beam of light that primarily lights up a first portion of a target coverage area, and the second light source is configured to project a beam of light that primarily lights up a second portion of the target coverage area, which is different from the first target coverage area. The first beam of light may spill onto the second target area, and the second beam of light may spill onto the first target area.