Hi Neon; I don't have experience with plant grow lights, however, when the light bulb that came with my purchased light box broke, I used a regular household lightbox, and it seems to work fine. My pictures are much better with the lightbox.
@NeonSunset I use a regular echo-friendly light bulb but might have to get an extra lamp, it is always good to use the lightbox with two instead of just one light
Also, worry not about Photoshop, this one is free and does the trick just fine http://www.picnik.com/