Well, I guess LED's are now a thing of the past.. hahah
http://glassbox-design.com/2009/eco-friendly-plasma-lighting-technology-reaches-aquariums/
I know its from 2009. But I saw some video's on youtube with plasma lighting vs MH.. hmmm..
Interestingly, it seems like this technology may overtake gas bulbs like MH for public lighting applications. For aquariums, it is available now. I saw an add in a reef magazine and looked it up. The product is called Seashine and is from a company called Straylight Optics.
Link to company product
http://straylightoptical.com/products/aquarium
Link to a reseller - not that expensive... and price will be coming down i'm sure.
http://sundancehydroponics.com/store/index.php?act=viewProd&productId=25