• Hard-to-find Halogen rough service bulbs built extra-tough for harsh industrial applications
• 4000-hour life--more than TRIPLE the life of ordinary 1200-hour bulbs
• Heavy-duty Tungsten filament with multiple, stronger supports to withstand shock and vibration
• Save money, reduce lost time and frustration with fewer bulb changes
• Set of two 300-watt/120-volt standard-size (4.75") high-intensity Halogen replacement bulbs

An outstanding value--triple-life rough-service bulbs for less than retail price of standard bulbs!