L23 rough service work light replacement T-3 halogen bulbs with hard case. Complete with bulb buddy case and (6) 500-watt halogen replacement bulbs. Works perfectly for work sites and garages, featuring extra filament support. Heavy-duty unbreakable plastic case protects your bulb from damage. Foam inserts in the case protect each bulb individually and reduces movement of lamps during transport. 4000-hour rated life for long use. To help ensure bulbs achieve their maximum life, install replacement lamps with clean gloves to prevent oils from contacting surface of bulb.