These indoor MR16 light bulbs provide an energy efficient replacement for older incandescent style bulbs with a GU10 base. They use only 6.5 watts of electricity while providing the same amount of light as a 50 watt incandescent bulb. Their long life means replacing difficult to reach bulbs less often saving you time and money. They are dimmable (100% - 15%) and cool to the touch when lit. Perfect for recessed lighting, track lighting, and other indoor lighting fixtures.