While not all HID lamps are HPS, all HPS lamps are HID. If you meant to say MH, there are many who do, in fact, run both during flowering.
The more I learn about lighting, the more I understand the purpose behind old timers using HID for veg and HPS for flower. They do not use them together!
So, shouldn't LEDs be similarly configured? I mean, if you have one fixture, shouldn't it have 2 o/o switches; one for Grow: blues/greens/or whites) and one for Flower: reds/greens or whites?
Thanks for chiming in guys. I sub to 3 other grow sites; it seems there is still a lot of LED confusion.
Trem0lo, feel free to post a pic of your light (Weezard, too).
Browse my albums for more led photos.
Hey Weezard, I know you have been out front on LEDs for a long time, but I have read studies regarding the importance of Green to enhancing chlorophyl A/B which is said to act as a super charger,
LOL!
Hyperbole is usually horse exhaust.
though I imagine we don't need much. Would you mind running an experiment- pop in a few 500nms and report back? Let us know if you will, so lurking eyes can stay tuned.
I guess you don't know me yet.
I usually speak from first hand experience and I try to test everything I read and/or dream up
If I do parrot something i've read, I usually cite my source and blame them for any errors.
Green light?
Been there tried that.
Even added full spectrum fluorescents for one side by side
I found that my girls did not NEED any green light.
No difference between my haves and have nots.
Did not hurt, but did not help.
Also did some poking around with UVb and UVc.
Same observation, almost.
Difference is, green light won't do damage. UVc will and did.
And, to my testing, UV does not drive, or even enhance THC levels.
In actual fact it can damage and degrade the active ingredient.
I now use 0 UV and potency is superb.
Go ahead and read everything you can find.
Jus' keep in mind that much of it is supposition by folks who could not grow petunia,s or run a real side by side test if you threatened them!
I bought a couple T5 HO Red Suns to mix into my 2700/6500s- they are mostly B/R but with a bump at 500.
While not all HID lamps are HPS, all HPS lamps are HID. If you meant to say MH, there are many who do, in fact, run both during flowering.
(Submitted prior to reading wazzups post)
Weezard: Here's a link to ONE article/study on Green and photosynthesis...
http://pcp.oxfordjournals.org/content/50/4/684.full.pdf
of course this flies in the face of your personal experience, but there it is.
hth
@weezard: as you may have guessed I do work in the horticultural industry.
We design greenhouse lighting as well as climate rooms. With cheap LED's you also need to ask yourself if the construction of the fixture is correct (the cooling!) and for how long those LEDs will shine that bright.
We need to define our terms here.
When I say "cheap", I do not mean "shoddy", I mean, simply, inexpensive.
Perhaps a bit less efficient, yes, but not "junk kine".
Construction/cooling?
You meant with cheap commercial, lamps/arrays, yah?
I build my own lamps.
I overkill on cooling and feeding of the LEDs
I can use 10 grossly overpriced Osram leds with snazzy names, or 12 decent, inexpensive Ledengin emitters to get the light levels I want.
My handling and headroom in design will give me the same life expectancy and degradation as the high priced emitters.
(Though, in truth, they will be obsolete, before they die of old age.)
So, it's a "black box" decision, for me.
I put this much power in this end, I get this many photons out the other end for at least this long.
Then I compare costs both short, and long term.
It' a no-brainer once you break it down that way.
From my personal experience it is much easier to grow under MH/HPS than under LED. From our greenhouse experience we know that the industry is no longer aiming at replacing the HPS on short term and the awareness of the importance of a good spectrum rises with higher light levels in greenhouses, and specifically for those companies / growers who want to mimic outdoor conditions.
"said authoritatively "Compressed 'air' used to fill tires is ~ 90%+ nitrogen,"
Not much of an authority- air is 78% nitrogen.
even better to validate what a ~ 20% improvement can make