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Utilitech 500-Watt EQ T3 Bright White Tubular Rough Service Halogen Light Bulb (6-Pack) in the Halogen Light Bulbs department at Lowes.com
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Feit Electric 500-Watt Bright White (2800K) T3 R7 Base Dimmable Halogen Light Bulb (2-Pack) BPQ500T3/CL/2/HDRP - The Home Depot
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CTKcom 500-Watt 4.7-Inch J Type T3 Halogen Bulbs(5 Pack) - 118mm Double Ended 500 Watt 120 Volts T3 Halogen Bulbs R7S Double Ended Filament Flood Lights Quartz Tube Lamps 120V ,5 Pack - - Amazon.com
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