Maybe someday LED's can compete with HID's...but today is not the day. I'm still waiting to see just one nice sized commercial grow op running LED's to produce HID quality buds. All I hear is about all the great PAR numbers and the like. Nobody wants a new lighting choice more than myself and the other commercial growers in my group. But, it's just not there yet. I don't like needing 64,000btu A/C units, but I don't have a choice. We're getting ready to add 20 more lights to our bloom room and I've been holding off in the hopes of LED or induction producing a light that can do what my HPS's do. But, it's just not happening. When we add it will be flip boxes and 20 more HPS's. There is a reason that every commercial op you see is lit with HPS's. If LED's could do the job, we'd all be running them. Maybe they're ok for a closet grow, but they have no place in a production facility.
I agree, for big grows leds are out of sight pricey. But for a guy flowering 6 plants at a time....he might be ok.
I think leds are certainly the future.and today is not that day...just sayin..they have some advatages.
I use 2 600watt hps over 6 plants..but I'm adding 4, 100 watt led's for supplemental lighting. Should reduce my cooling costs ( I'll raise the hps some) Less radiant heat should lower soil surface temps, allowing less water use, and allowing the root mass to expand into the upper layer of soil. Should be able to further reduce stretch too.
But I'm retired, got the money to blow, and like to experiment. And my goal is to produce quality..quantity is secondary. I grow sativa for medical purposes (parkinson's) and need high thc/thcv values....low cb values. I use a ton of uvb the final few weeks as well...my strain produces a very motivating effect....no "couchlock" effect at all..but still enough cb value to relieve rigidity...and the theory is that thcv acts a a dopamine regulator...and dopamine is what needs regulating in PD...get the dopamine regulated and mood, "affect" and motivation all improve. At least for me...and roughly 70% of all other PD patients...
Now, if I were a stoner growin "pain" meds..well I'd grow an indica. Less light needed, bigger yields, faster flower times...and much easier to care for. But sativas are the "stuff"...for me.