We are selling our Hyperion S led as we've changed lighting, T5's are not working and some LEDs are not working so the whole unit could do with a service or use it as is. This is the 2×145W and 4×T5 model. We have a tree that this was sitting on over our tank which is being sold separately. AGAIN THIS IS NOT FULLY FUNCTIONING BUT STILL WORKS. There is still alot of different settings you can change from your pc/phone to suit your tank requirements. Has a full sunrise to sunset mode which still works 100% automatically so no manual turning on and off, also you can change the sunset start time and how long it goes for as well as the sunrise etc,