I need to set up a small grow light system to maintain small some desert rose plants over the winter. The larger plants go into dormancy, but I'd like to keep the small ones growing throughout the winter. They don't need to flower. And if I knew what I was doing, it would be good. I have $100 of free gift cards from Lowes, so I need to get everything there. I have a small space, 4' x 1 1/2" shelf to use.