I found an earlier post I'd made here & was certain my numbers/ratios & etc were correct. I must correct myself somewhat though from above, it was an LED vs. HID grow and the grower used two (2) of those spendy UFO LED fixtures against MH/HPS lighting.
The results as far as time and weight were the same as above, 3 weeks longer for the LED to finish & 66grams of bud vs. 100grams from the HID lighting. A link to my previous post (safe in-house link btw) is below & I'm going to see if I can scare up some pics of that grow as I know where I saw it.
UFO vs. HID grow