Infrared technology brings this 175-watt heat lamp bulb up to full temperature almost immediately, eliminating costly warm-up time. Robust and sturdy hard glass construction make these lamps a safe heat source. General radiant heating is ideal for bathrooms, hot food displays, space heating, and agricultural needs. Features a Medium SKT base. The compact form and universal base ensures a variety of uses around the home. Philips reuses as much glass and packaging material as possible, reducing environmental impact. Long-lasting bulbs can shine up to 5,000 hours. This product ships as a single bulb.