Do you think this will be powerful enough for plants? The Tropical Marine Centre has designed these lights with suitable spectrum for tropical fish/planted aquariums. http://www.tmc-ltd.co.uk/aquarium/aquaray-lighting.asp This could be the future of aquarium lighting, major benefits being large reduction in costs and heat output. However I do not know anyone who has tried these. The other thing ofcourse, this will involve retrofitting and manufactureres like Juwel are bound to be slow to act like they were with T5 lighting :S With the cost of electricity going up these could be good for the hobby...that is if they can proved the cottect lighting for plant growth.