Not for the most cost effectiveness no, I wouldn't recommend a energy guzzling HID. The "basis" for my recommendation, would be the simple fact that 1, HID's use a lot more energy vs a LED, 2, they give off a lot of heat which cannabis plants DO NOT like, 3, to rid that heat of the area, you will need to use an exhaust system which costs more and uses more electricity. I can run my LED all day and not have to worry about heat. And plus, to think that an $120 LED can't pull a pound off a plant is goofy and misinformed. Nobody is arguing growth effectiveness, because it's already been proven that LED's are far better for better growth vs a HID. Cost effectiveness is hands down, LED's used to cost more, but they are cheap now and can do the same/better than a HID for less cost.