1 leading edge, For built-in driver LEDs, incandescent lamp, 230V halogen lamps, Conventional transformers and other lamps suitable leading edge dimmer
2 trailing edge For external diver LEDs or , incandescent lamp, 230V halogen lamps, Electronic halogen transformer with 12 V halogen lamps and other lamps suitable trailing edge dimmer
2 trailing edge For external diver LEDs or , incandescent lamp, 230V halogen lamps, Electronic halogen transformer with 12 V halogen lamps and other lamps suitable trailing edge dimmer