Use upside down empty pots for spacers. Lids from spray paint cans, empty soup cans, etc. Since not all plants are the same height, using spacers under pots will allow you to keep plants near the lights. Easier most of the time than raising and lowering the whole fixture. Reflectors. White walls, matt boards, sheets of white Styrofoam. Surround the shelves/plants on 3 sides with reflectors. I have gotten most of my fixtures off eBay. Watch the S&H. Single 2 foot, double 2 foot, single 4 foot, double 4 foot. 4 foot X 8 tubes is the biggest I have. 6500K. (or anything in the 6000'sK.) Use timers. 13-16 hours a day is best. Gene
