400W-500W Equivalent LED Light Bulb, Bright White Bulbs 6500K 65Watt High Lumen, Cool Daylight White E26/E27 Medium Base for Garage Warehouse Factory Workshop Street Backyard Large Area - Amazon.com
Utilitech 500-Watt EQ T3 Bright White Recessed Double Contact Halogen Light Bulb (6-Pack) in the Tube Light Bulbs department at Lowes.com
Feit Electric Company Bulb 120V 500W Flood | Leslie's Pool Supplies
Fluorescent Light Bulb 105 Watt (500 Watt) 8500 Lumens 6500K 277 Volt E39 Base | eBay
R40 500 Watt Pool Bulb by CintBllTer – Replacement for R40FL500/HG Incandescent Flood Reflector Inground Pool Light Perfect for Night Swimming - E26 Medium Screw Base - Frosted Glass - 120V - Walmart.com