Wood or aluminum?

[Aquattro]

I now need to suspend my light box from 2 inverted "L" brackets. I can get these made out of aluminum, but not quite the look I'm going for.

If I use 2" square hard wood, what are the chances it's going to bend from the weight? Light is about 35 pounds. I can brace the top foot, but the 2 feet behind the tank would be just straight pieces. I'd prefer they didn't bend eventually.

Thoughts?