For small tanks where there is not a big concern with having lots of bells and whistles like colors adjustments, etc. they make a nice cheap light. I have a small orb project started that may wind up with those. I still have some other options in the mail but the Harbor Freight light is in the running. Rather than deal with the extra three, I just cut them off as they were not needed for my use.
Nice to see some "out of the box" thinking..