The invention discloses a dimmable energy saving lamp suitable for one-key type control. which comprises a lamp holder, a lamp cavity provided with an electronic
ballast, and an energy-saving lamp tube. A rectifying and filtering circuit, a
voltage-controlled oscillation
half bridge circuit, a series
resonance circuit and a single-
chip microcomputer processing circuit are respectively arranged in the electronic
ballast, the input terminal of the single-
chip microcomputer processing circuit is connected with a working state detecting circuit, and the output terminal of the single-
chip microcomputer processing circuit is connected with the
voltage-controlled oscillation
half bridge circuit through a
signal converting circuit; the dimmable energy-saving lamp has the advantages that when the working state detecting circuit detects that the on / off state of the power switch is changed, then different
PWM signals can be outputted by the single-chip microcomputer and are converted into average
voltage, the average voltage is inputted to the input terminal of the voltage-controlled oscillation
half bridge circuit after being fitted, to ensure that the working frequency of the electronic
ballast and the
light source current can be changed according to the controlled requirements, and thereby the purpose that the brightness of the
light source can be adjusted can be realized; the adjustment to the brightness of the
light source can be realized through the on / off conversion of the power switch in the dimmable energy-saving lamp, a
dimmer switch is eliminated, and the original
electrical wiring is not required to be modified during the process of installation.