Eveready low energy MR16 Dichroic ECO Halogen lamps use UV stop glass ÔÇô this reduces the bleaching effects of Ultra Violet radiation on materials and also on exposure of the skin to UV rays. They give a clear, crisp pure white light, have a longer life, compared against incandescent lamps and are dimmable.50 watt 12v Halogen bulb uses the equivalent of 35 watts of power