EZ ON/OFF. Features backlit LED rocker switch * 110V AC Powered * The excellence of 508 Natural Daylight Illumination - Incandescent bulbs are made from things like hot filament wire and inert gases, but OttLite 508 Illumination bulbs are made from something better the DNA of the sun! Okay, not really. But, OttLite CFL lighting is expertly engineered with 508 technology to bring the quality of natural sunlight indoors. It"s like having a tiny sun in your light bulb, except a whole lot cooler. Ott-Lite bulbs produce less heat and use less energy. * Bulb included. Not just any bulb, though--an energy efficient 13 watt bulb rated to last up to 10,000 hours. (Replacement bulb type Y) * Dimensions Base - 3 x 4 Height - 11 up to 17