This OSRAM EXR bulb is 300 watts 82 volts. It has a GX5.3 Bipin base and has a rated life of up to 35 hours. This bulb has a CC-8 filament and a luminous flux of 925 lumens. This bulb has a clear finish. This EXR MR13 has a 100 CRI and an overall length of 1.755 inches.