TWO UV Purple 9-LED T15 921 912 516 579 917 918 920 922 923 906 904 916 Light Bulbs *Lifetime Warranty* Nine pieces of clear refractor LED chips per bulb Colour: UV Purple 12v DC Size: Length - 30.63mm / Diameter - 15mm Lifespan: 50,000 working hours. Lifetime Warranty!