I'm looking at buying some plastic grow bags again this year. I can get 5 gallon white and 10 gallon white, yet the 7 gallon bags at my local hydroponic store are black. I'm of the opinion that black absorbs radiant energy and gets hot whereas white reflects radiant energy and remains cooler. What about plants in black plastic containers? Anybody have reservations on black as a container color? Maybe hot roots are good, I don't know.