This unit is used to power your aqurium light tubes incorporates an electronic ballast designed for use with high output t5 lampsr r complies with new european lighting standardr totally eliminates flickerr independent switch on mains cabler r t5 lamps are 80 brighter than the more traditional t8 lighting which makes them ideal for species with higher light requirementsr suitable for 1 x 24w or 1 x 39w light tuber this means that in the future if you upgrade to a larger tank you will be a