This Cool-Lux DC5000 In-Line Dimmer (5.0') is a 12-15VDC dimmer rated for 100W max. The DC5000 allows total light control from full power to no power and everything in between. When used above 60% intensity, it will keep the color temperature of your light within ± 200K. It features a knurled knob that rotates smoothly beneath the finger. The DC5000 is compatible with the Mini-Cool, Micro-Lux, SL3000 and U3 lights used in DC mode.