Easy on the eyes, the SPT-SL-811B Easy Eye Energy Saving Desk Lamp with Ionizer - Black (4-tube) will reduce eyestrain and unwanted reflections with its flicker-free bright white light. The floor lamp simulates natural lighting and has a flicker free feature with 25,000Hz frequency. It includes a Japanese made 27W bulb with an average life span of 10,000hrs. The flexible goose neck and swivel head gives it more versatility and utility. The anti-reflective lens prevents unwanted reflections and the built in ionizer helps to purify the air. The dimensions of the SPT-SL-811B Easy Eye Energy Saving Desk Lamp with Ionizer - Black (4-tube) are (W x L x H) 6.5 x 8.5 x 23 in.