Exo Terra 120cm / 47" T5 UVB Fixture Terrarium Top 54wHigh Performance Reptile UVB Fixture For use with the Exo Terra Reptile UVB VHO T5 Bulb Highly polished reflector increases lamp output 2,5 times High quality electronic ballast Allows you to link up to 10 fixtures Increases the performance and lifespan of any T5 VHO Bulb Can easily be placed on top of any terrarium No flickering; reduces stress in reptiles and amphibians Enhanced UVB penetration distance The Exo Terra T5 Terrarium Top High