Both fixtures are 20", standard ten gallon. If I go with the first one, would it heat up the tank too much in the summer? I don't have air conditioning and was planning on using a small fan to cool the water's surface when it gets hot. I've read this can be done for smaller tanks in place of a chiller.
You guys want to hear something crazy? I'm getting married next Thursday and I keep trying to tell myself to put this project off for another month... but you know, once the bug has bitten, that's about it...

I'm leaning to the second light now just because it's half the price of the first, and also half the wattage (energy bill). I only plan on keeping some easy stuff so I think I should be able to get by with it.
Are lunar lights really that cool? I've never seen one before. I mean I've seen them, but never in a fish light fixture.
Thanks for everyone's help!