A RETROFIT LIGHT EMITTING DIODE, LED, LIGHTING DEVICE FOR CONNECTION TO AN ELECTRONIC BALLASE

A retrofit Light Emitting Diode, LED, lighting device for connection to an electronic ballast is presented. Wherein the LED lighting device comprises a steady state mode during which it emits light and a standby mode during which it is not emitting light. The retrofit LED lighting device comprises an LED array for emitting light during said steady state mode; an alternating current, AC, LED driver arranged for receiving an AC supply voltage, from said electronic ballast during said steady state mode and for driving said LED array based on said received AC supply voltage. It also comprises of a filament circuit arranged for receiving said AC supply voltage from said electronic ballast and for supporting a filament current circulating back to said electronic ballast for indicating a presence said lighting device to said electronic ballast, and a lamp current to said AC LED driver for driving said LED array for emitting said light during said steady state mode. Additionally, the retrofit LED lighting device also comprise of a lamp removal simulation circuit arranged for simulating an absence of said LED lighting device to said electronic ballast by interrupting at least one of said filament current and said lamp current, during said standby mode. A corresponding method and system of retrofitting LEDs are also presented.