Yeah, the only thing we do down there is watch the fish and watch TV so there's not a whole lot of light on that side of the wall. Most of the room light actually comes from the fishtanks.
On the downside, my sump just started leaking. Its an old 40 breeder with a metal frame and a slate bottom. I resealed it once a few years ago, but I think its been bumped enough times sitting on the floor to rupture a seal. Luckily its one of the sides, not the bottom, so it will still hold about 3" of water, barely enough to keep the pumps running. I'm getting a new (used) acrylic wet/dry for free, just needs some work, so I'll post some pics after I pick that up this afternoon.