Philips 4.5w LED GU10 Based 50w Equivalent 454363 This GU10 spot is an easy switch from standard incandescents and delivers quality light for recessed and track lighting fixtures. This GU10 indoor spot light provides a focused beam of bright, white light. Lasts 22.8 years- Long life reduces the hassle of replacing bulbs so often This bulb saves $125.12 in energy costs when you replace a 50W incandescent with this 4.5W LED light bulb Just by turning the switch, the light is at full brightness. No slow starting or waiting.