If you are wanting more plant options, other than java moss, it would be ok to get that fixture and use only 1 65w bulb. Even with 65w over a 29g, you will want to have some type of
co2 injection (DIY would work) and dose some ferts. You'll want to get alot of stem plants to outcompete algae as well.
When you feel ready to tackle high light, you'll need pressurized
co2 with 130w, regular fert dosing (macros and micros), and again, a lot of plants.
$50 is a good deal.....but don't put 130w over your tank right now.......and don't use 65w over the tank until you get more plants.