The twin T5 unit is supplied with one 6% and one 12% High output T5 Reptile Systems tubes enabling you to reproduce a dawn to dusk diurnal cycle. This can be automated with the use of timers ( not supplied ). Visible light UVA and UVB will be provided in a natural way for your reptile. Versatile : Lamps can be independently controlled via separate switched power supplies. Robust : Strong aluminium and vulcanised composite construction . Water resistant removable T5 end-caps. Performance : Twin energy efficient electronic ballasts for rapid start and maximum tube performance. The highly polished curved reflector can increase output by up to 100%. Universal : Compatible with HOT5 fluorescent lamps and Reptile Systems T5 New Dawn LEDs.