Zoo Med ReptiSun 10.0 UVB Mini Compact Fluorescent 13 Watt (4 Pack) Pack of 4 Zoo Med ReptiSun 10.0 UVB Mini Compact Fluorescent 13 watt Perfect for all desert and basking reptiles 10% UVB output & 30% UVA output Uses a special UVB transmitting quartz glass for maximum UVB penetration Can be oriented either vertically or horizontally