Specifications: 1) Watt: 10W/15W/18W/30W/36W 2) Bulb type: T8 3) Base: G13 4) NV-B rays have good physiology effect on human body and can cause photochemistry and photoelectricity in skin 5) UV-B rays even have good effect on organ, nerves system, secretion system and cycle system of human body 6) CE and ISO9001 approved