Looks fine for now, I see you've taken good measures to keep all the light in and not waste any. Issue I see coming is when those plants really start to take off, you are quickly going to have problems with getting sufficient light onto them. Right now it looks like you're running the 2x40W shop light and 2 x 45W CFLs, total 170W? Two plants? Hmmm . . . I am running 5 plants under 400W of mixed lamps, so I guess if you added another pair of 45W CFLs that should do it for you. I think the larger the grow the more economical the lighting becomes.