Thanks, Sharkweek! When I first saw it in the store I thought "no way". But then I thought about it some more. I really love the 24" width of the tank to give fish maximum swimming length in a small tank.
I wired up four white LEDs and have two hanging inside the light hood on the far left and right sides. It just adds a bit of accent light to those shadowy parts. Helps a little.
Tonight we went to Petco and the kiddos picked out a blue/red Crown Tail Betta. I'm currently floating the cup in the tank and adding tank water to it every few minutes to slowly acclimate it.
I have two remaining concerns with this tank:
1. The tight fitting hood combined with the 18" light seem to make the temp stay higher - around 79 to 80. I'm not sure this tank will go any cooler with lights on. But we'll see. That temp should not be a problem for the Betta, anyway, from what I've read.
2. Even with the filter flow turned all the way down, I am worried that the current will make the Betta unhappy. I'll see how it does and make changes if needed.
Will post pictures tomorrow.