Woods L21 250-Watt Rough Service Halogen Bulb with Bulb Buddy Protective Case, 6-Pack Includes Bulb Buddy Case and (6) 250-Watt Halogen replacement Bulbs Rough Service bulb has 2x the lifespan as regular, 4000-hour rated life with heavy duty filament support The unbreakable plastic case is heavy duty Foam inserts in the case protect each bulb individually Halogen Bulbs have T-3 Shape, 3 inches long