These indoor PAR38 light bulbs provide an energy efficient replacement for older incandescent and halogen bulbs with a medium (E26) base. They use only 18 watts of electricity while providing the same amount of light as a 120 watt incandescent bulb. Their long life means replacing difficult to reach bulbs less often saving you time and money. They are dimmable (100%-5%) and cool to the touch when lit. Perfect for recessed lighting, track lighting, and other indoor lighting fixtures.