Ltpgtvarilight v pro series classic white plastic 1 gang single 1 or 2 way 400 watt push onpush off trailing edge dimmer with white knob eliminate dimmer buzz for gls bulbs gu10 lamps and lv transformers including trailing edge loadsthe v pro series dimmer has soft start technology allowing a longer life span of the bulbs or lamps used by increasing the brightness level softly which also creates a welcoming effectampnbspltpgt ltpgtthe v pro series were primarily des