so lets do some math here for ledbudguy, 5 days of drying = 27 ounces. (I know it was a bit more but I forgot the rest) we'll say that he even loses an ounce and a half to addition cure drying and excess stem removal. 25.5 ounces, a ounce per plant, however when you look at it from a electrical efficiency standpoint 721.65 grams. He had 5 of the 170W models. 600W total draw. 721.65/600= 1.20 g/watt. Not bad at all. Each light is pushing 144 grams. If he were to go head to head with a 600W HPS I would doubt the grower using the HID would yield anywhere around a pound and 2/3s.
We'll say he even sold it. Ill go as far as proposing that even if all that was sold at once, at 200 bucks an ounce (factor in bulk pricing) he would theoretically have made 5400. The LED's set him back 2000, we'll call in another 1000 for electricity, CO2, soil, nutrients combined. He walks away with 2400 even, while paying off his total investment on his first crop from it. All for less than a Kilowatt per hour. Sounds pretty nice if you ask me.
Lets not forget that those clones were pure shit, covered in mites too if I am not mistaken (or a def), and he tossed them on a short veg after they stabilized. With optimal growing circumstances I bet he could have pulled a shit load more.