Feit Electric Utilitech high lumen 500-Watt EQ Daylight Medium Base (e-26) LED Light Bulb in the General Purpose LED Light Bulbs department at Lowes.com
Ushio ECT Photoflood (500W/120V) 1000266 B&H Photo Video
500 Watt Halogen Bulbs, 2 Pack
Set of 3 1950's Amplex 500 watt Light Bulbs Tested & Work Unused NOS Old Stock | eBay