Looks cool, I like the cooling fins on it, but how many people have just a light socket hanging over their tank without some type of enclosure? That light states it can't be put in any type of enclosure/reflector or it will overheat.
You know, Costco around here sells LED light bulbs that look similar to the one that Doc just posted, but uses standard LEDs instead of high output ones, but only cost around $10 vs $100 and for your purposes would be just fine, although your color options are nil with the costco type of LED light, you get white and thats it. LED light bulbs are the new Compact Floro bulb that was so great just a year ago but now considered very bad, actually worse than incandescent light bulbs when you look at the environmental cost of producing and disposing of them. Only thing a CFL bulb has over the 100 year old regular bulb is it uses less electricity.