TCP RLA155BL is an energy efficient Replacement for a standard incandescent household light bulb but uses only 14 watts! this bulb emits a festive blue color when lit which is perfect for demonstrating autism awareness! this bulb is suitable for use in indoor or outdoor enclosed fixtures and is non dimmable. The TCP RLA155BL bulb can directly replace a 40 watt incandescent bulb and provide a bright blue light that is perfect post and sconce lighting.