REPTISUN 5.0 MINI COMPACT FLUORESCENTIdeal for small tropical terrariums 5% uvb output, 30% uva output, full spectrum Special uvb transmitting quartz glass for maximum uvb penetration Cool burning compact fluorescent bulbs screw into standard threaded sockets, eliminating the need for a separate ballast Can be oriented vertically or horizontally in the hood or clamp lamp fixture Helps prevent or reverse metabolic bone disease