Not everyone can afford them. Seeing how he has one or two plants using 100 watts he probably doesn’t have $379 for a spider farmer or skyline. Hell do great with his space with a ts1000 149 watt draw. .9 gram per watt at 18 inchesDon't waste your money on mars lights,they use stolen tech and low grade components.Save for real lights or wait till you can go outdoors.