Feit Electric 500-Watt EQ T3 Dimmable Bright White Tubular Rough Service Halogen Light Bulb (2-Pack) in the Halogen Light Bulbs department at Lowes.com
Rowrun 30W R7S J118 T3 LED Bulb Daylight White R7S Base 118mm 300W Equivalent Double Ended led Replacement for Halogen Workshop Lighting Bulb 6000K Non Dimmable (1) - - Amazon.com
QLEE 4336507720 R7S LED J118 118mm Dimmable Bulb 30W Warm Light 3000k AC120V 3000LM Double Ended J LED Floodlight for R7S 200W 300w 400w Halogen