75 WATT MR16 JDR HALOGEN FLOODLIGHT - MEDIUM BASE - 120 VOLTS - 2,500 HOURS INDUSTRIAL GRADE - Industrial Grade tungsten halogen light bulbs use a quartz envelope for durability. The regeneration cycle continuously restores the filament, creating a 3 times longer burning life than standard halogen bulbs with clear crisp white light. Bulborama Industrial Grade tungsten lamps are engineered to minimize heat output while maintaining light output.