Anyray&reg; (5)-Pack 500 Watt T-3 J-Type Halogen R7S Clear 500W Double Ended 500Watt Bulbs 120 Volt 118mm or 4.56 inches long 5-pack 500 Watt T-3 J-Type Halogen R7S Clear 500W Double Ended 500Watt Bulbs 120 Volt 118mm or 4.56 inches long Anyray A1843Y Works with 110 Volt 120 Volt 130 Volt as well, High Brightness & Energy efficient light bulb LINEAR HALOGEN LAMP Usage: Home, Office, Restaurants, Stores, Schools, Landscape / Universal bulbs Length: 118mm or 4.56 inches long