SPT EaseEye desk lamp is Flicker-free, bright white light duplicates natural lighting, which contributes to an overall sense of health and well being. Soothing natural light minimizes glare and eyestrain and increases contrast and clarity. 27-Watt energy efficiency light bulb is equivalent to an ordinary 150-Watt bulb and lasts 5 times longer. Efficient compact fluorescent lamp is controlled by an IC chip originated from Japan, which produces a flicker-free frequency of 25,000Hz. Features an built-in Ionizer to purify the air as well as an Anti-reflective lens that transmits more light to decrease computer glare, reduce eyestrain and disturbing reflection.