Chimera Mogul Base Lamp - 500W/120V 5505 B&H Photo Video
Utilitech 500-Watt EQ T3 Bright White Recessed Double Contact Halogen Light Bulb (6-Pack) in the Tube Light Bulbs department at Lowes.com
Philips Halogen 500-Watt T3 Work and Security Light Bulb, Clear Bright White, Dimmable, Double Ended Base (2-Pack) - Walmart.com
500 Watt Halogen Bulbs, 2 Pack
500 Watt Halogen Light Bulb - Rainbow Technology
500 watts Halogen Bulb Lamp GY9.5 single ended 110V 230V for 500W fresnel light - AliExpress
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
Feit Electric 500-Watt Bright White (2800K) T3 R7 Base Dimmable Halogen Light Bulb (2-Pack) BPQ500T3/CL/2/HDRP - The Home Depot
Westinghouse 500-Watt Halogen T3 Double-Ended Clear RSC Base Light Bulb (2-Pack) 0497800 - The Home Depot
2pcs/lot Halogen Light Bulb 220-240v 500w 500 Watt J Type T3 118mm (r7s) - Light Beads - AliExpress
Round Reolite 500w Halogen Tube
Philips 500-Watt T3 Halogen Double Ended 4.7 in. Light Bulb (2-Pack) 415729 - The Home Depot
Feit Electric 500-Watt EQ T3 Bright White Recessed Double Contact Dimmable Halogen Light Bulb (2-Pack) in the Tube Light Bulbs department at Lowes.com