Thanks for the response. I'm not familiar with the DS XML, could you provide a link? (google wasn't much help for once). I'm more concerned with matching the yield per area (or per tray in my case) than in comparing watts. I just referred to the gpw because it seems that it's a common calculation of efficiency (although a flawed one).
The reason you haven't seen the higher yields is because the units are just coming out. No one has had them long enough to pull a yield yet. Even me with the apache, I haven't had a full flower run. It's these new units are the first to have true 1000 comparable PAR numbers at hanging heights. The old ones were good but not intense enough at a normal distance from the canopy. Even good led's used to quote 12" par numbers...but now what they used to get at 12", they get at the actual hanging height and higher.
Good point, I guess I'm just a little too impatient to see the results I'd like to, those umole charts have me very eager to jump in and get some panels. That at600 looks like pure awesomeness, but I'm wondering if I should go with 6 or 8 a51 panels over 2 at600's to get a better light spread (or if I should slow my roll altogether and wait another generation or 2 of led tech.). Like I said above, I'm doing well with hid, so for me personally, the yield will have to be there for the switch to be worthwhile. Also, thanks for your input, I've learned a lot from you and therefore really value your opinion.
par isn't everything , its a value of intensity. Spectrum and cri also accounts for performance. My inda gro has lower µmole/s than my old apollo 10 led but the IG outperforms the apollo. check this thread
Sorry, no picsAny chance that we could see them, please?
Why do I feel dirty after typing that?
This is a question i also want answered...NOW damnit!
Forget about LEDs and stay with HID. It's a nifty thing to tinker with but cannot match the performance of HID lighting. Maybe someday, but not at present. Now, an HID/LED hybrid system is something to consider. If you have the space, LED for 100% of photoperiod with the HID running for an hour or so three times during the cycle. I went with LEDs because I do not want to worry about fire hazard of HID and have been extremely disappointed. Nothing but trouble, troubles never had with HID. I am talking about growing in pots using pro-mix. True hydroponics may indeed be another story with LED, but trying to maintain proper moisture and nutrient levels with the slow transpiration rates of LED is pretty much impossible using soil less mixes . No comparison to the ease of HID.
reiteratting what he hydro shop guy said. Obviously you never grew with led's. A51, hans, and apache are killing it and matching and beating hid's . induction too. its about 600 watts of quality led and induction to match a 1000 watt. but led and induction produce far better quality. less heat and noise and cheaper in the long run.
To raise your plants transpiration level, you need to raise the temp in you grow space, to the low to mid 80's.
Thank you, Hyroot.
newtoMJ just stated he got over 2 grams/watt from two generation ago A51 LEDs. I suspect you bought inferior panels or you are running your room too cold. Bad Karma is crushing it with LEDs!
