these plasmas work well, provided you have enough headroom as they are massive also they pump out alot of hot air so you'll need a big extractor, in a small to medium room go with something else as its not practical, but ive used them from start to finish and they are good if you have a big room but you'll need more than 1 as the light spread isn't great and i wouldnt risk it on a lightrail as its almost 20kg and you wouldnt want £800 worth of light falling on your babies, for now i'm going back to sunmasters, i know they cost alot more to run but these plasmas are just not practical at the moment, but im still happy with the results, i'll wait till they make em smaller and in the correct spectrum too, 1 thing i will say is that its 1 intense light, if you put your hand 10 inches under it you cant see it, it turns into a white blur, if your a rich bastard with a sizeable room then go with these but if you live at home with mummy, avoid,,,,,,,,,pe@ce