OK let me break down my LED grow and shed a little light on this, hah. I don't want to debate the subject of LED vs HID, but these were my results and you guys know I document everything. I respect a lot of the growers on here that use HID. What works for you is all that matters. I just don't want people spreading the wrong information without using real facts.
My Area 51 160w LED was $500. GPW 1.65
MY HID "System" was $550. GPW .65
My HID "System" 400w + Cool Tube + MH Bulb + HPS Bulb + Fixture Exhaust Tubes, Conectors + 180 CFM Inline Fan + Variable Speed Controller + Extra Oscillating Fans + high heat sensor cut off (for fire in case the fan quits), well you get the idea,it adds up!
I pulled the exhaust system completely out of my closet for the HID heat extraction and enclosed light fixture. This removed an inline fan, ducting, variable controller, heat sensors, and most important stopped the house air conditioning from running all the time. The air exchange system now runs at 15% power with on and off cycling. Before with HID ran at 90% power all the time lights were on.
You can imagine how much money I'm saving when it's 100 degrees outside and my home a/c is trying to keep the temps at 73 degrees. With the HID "System" the a/c didn't shut off until the lights went out. I couldn't see wasting all that money by having cool air sucked out of the house from my grow closet.
If we are going to use something simplistic like GPW (grams per watt) I more than doubled mine by tossing the 400w HID and going to a 160w LED. Yes, I had some other things factor in to my LED GPW like better soil, and three additional weeks of veg time.
Bottom line, I was able to maintain, actually improve my harvest weight on LED. Averaged 2.6 oz per plant - five plants in my last grow. I was at 2.25 oz per plant on HID. Biggest change is of course the electricity. I consume 88% less electricity without sacrificing yield and no bulb replacement, yay.
So, you have to figure more than
acquisition costs when making an investment into efficient technology. My GPW went from .65 to 1.65, not that GPW should be used to measure your results, but most old timers, especially HID users use this number. I think once you factor in operating cost the decision becomes really clear for a small grower. Spend some money now, and save every day as you operate the grow.
In my opinion, high quality LED lighting is worth the money in the right hands.