FCL bulb. Cross Reference: Industry (Q500T3/CL, J120V-500W), Ushio (1000488), GE (23731). Specification : Value Volts : 120 Watts : 500 Lumens : 8750 Color Temp : 2950 Rated Life (hrs) : 2000 Max. Length (in) : 119MM ANSI # : FCL Availability: Usually ships in 2-3 business days ge-lighting-fcl-bulb-500w-120v-h500120$3.99