Westinghouse Rough Service 500 watts T3 Halogen Bulb 9500 lumens White Utility 1 pk - Amazon.com
500 Watt Halogen Bulbs, 2 Pack
Feit Electric 500-Watt Warm White (3000K) T3 R7 Double-Ended Tube Dimmable Halogen Rough Service Light Bulb (48-Pack) BPQ500T3/CL/RS/2/24 - The Home Depot