Halco Amerlite 500 Watt Inground Pool Light Replacement Bulb
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Feit Electric Company 500 Watt R40 120/130-Volt Pool Light Bulb - NA706 - INYOPools.com
R40 500 Watt Pool Bulb by Lumenivo – Replacement for Halco R40FL500/HG Incandescent Flood Reflector Inground Pool Light Perfect for Night Swimming - E26 Medium Screw Base - Frosted Glass - 120V - - Amazon.com