This has been discussed previously. With the rooms approx. the same size but shaped differently, and moving from 2 hps to 2 led's- I was able to improve yield 1-2 lbs a light. Now the plants are more manageable with the topping, while the led's offer a much better light spread thru the room. i actually thought by switching to led's the room would operate cooler, which is not the case. But it worked out as the plants like it a bit warmer and grow better u der L.E.D. The led's paid for themselves (I paid $2800 for 2 Gavita's delivered when they first came out) from the very first crop. lol
All my grows since 2010 are still out there on RIU and the Farm. Others are on Overgrow, ICMag, and a few other places. Fun sometimes to go back and review. 4 grows a year, almost 15 years- that's just shy of 60 threads- it's time to retire. lol