Our NEW Led Light unit is a perfect replacement for Halogen units. No more changing Halogen bulbs and listening to fans. This little unit can hold 500 0.75mm fibers. Produces WHITE light and has multiple shimmering effects, dimming controls, and speed adjustment. To turn on, push button once, to change speed of flash click button 2 times, to Dim or raise light output Hold button down then release. Settings are retained the next time the illuminator is turned on.