Retrofit LED lighting system for replacement of fluorescent lamp

摘要

A LED retrofit lamp for replacement of socket fitted CFL lamp driven by fluorescent ballast is provided. The retrofit lamp comprises a plurality of LEDS in connection with the fluorescent ballast. The circuit of the lamp comprises a bridge rectifier that converts the AC waveform into DC.

主权项

1. A retrofit LED lamp driven by a ballast, the lamp comprising:
a string of LEDs with a series resistance mounted on a metal core printed circuit board (MCPCB) plate; a circuit comprising an anode end and a cathode end that serves as an input from the ballast; a thermal cut off means comprising a series resistor connected with each of the input coming from the cathode end and the anode end; a full wave bridge rectifier equipped with a first input terminal coupled to the anode end and a second input terminal coupled to the cathode end, said full wave bridge rectifier having a output connected to the string of LEDs; wherein the said circuit is mounted on the MCPCB plate and wherein the ballast is external to the retrofit LED lamp.