This Ushio CHK, INC120V-150W 1000136 bulb with ANSI code CHK uses 150 watts and 120 volts. It has a BA15S base, and an average rated life of 500 hours. It has a T8 lamp shape, and is an incandescent bulb.
CHK bulb.
Possible substitute: CGE (more light, 1/2 the life).