You should be able to make a hood for under $20; I did for my 5.5g. I used acrylic (plexiglass) rather than glass for the cover, which was very cheap (I paid $1 for 3x what I needed).
I would do that, with 2 15 watt+bulbs it should be pretty high light.The first would be to get a bigger bulb and find some adhesive Mylar to line the interior of the strip.....................If I go this route, I guess I could always add an additional bulb to the opposite end of the strip.