TRU-AIM BRILLIANT MR16 lamps have an aluminized reflector that does not deteriorate over time. Therefore they continue to have highly stable color and crisp white light output throughout their service life consistent color and transmits heat through the front of the lamp to reduce fixture damage. This Sylvania Tungsten Halogen Tru-Aim MR16 has a GU5.3 Bi-Pin base 20 watt 12 volt flood beam and comes without front glass. Base GU5.3 2-Pin Beam Angle (deg.) 36 Beam Spread Flood FL Bulb Type Halogen Bulbs Color Temperature (K) 3000K Diameter (in) 2.00 Filament AXIAL Maximum Overall Length (in) 1.75 Rated Life (Hours) 4000 Shape MR16 Voltage (V) 12V Wattage (W) 20W