Designers Edge L15 L-15 Work Light Replacement T-3 Bulbs with Hard Case, 500-Watt, 6-Pack, Clear Includes Bulb Buddy Case and (6) 500-Watt Halogen replacement Bulbs 2000-hour rated life with filament support The unbreakable plastic case is heavy duty Foam inserts in the case protect each bulb individually Halogen Bulbs have T-3 Shape, 4-5/8-inches long