Plusrite 3357 - 300 Watt Halogen Light Bulb - T3 - R7s Base - Clear - 2,000 Life Hours - 5,950 Lumens - 120 Volt - Amazon.com
5 Pcs Dimmable R7s 118mm 300w Halogen Pencil Bulb Ac 220-240v 3100lm Linear Halogen Floodlight For Landscape Lighting, Security, Street Light | Fruugo NO
10pcs Glass Tube Halogen Light Bulb 110-120V 300W 300 Watt J Type T3 118mm R7s Halogen Blub - AliExpress
Satco 500W 120V Clear R7S Base T3 Halogen Work Light Bulb - McCabe Do it Center