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Offlinechris606
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14 Watt LED Grow Light
    #600868 - 12/10/11 11:49 PM (4 years, 11 months ago)

can a 14 Watt LED Grow Light be useed for Hempy SOG


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InvisibleStonethM
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Re: 14 Watt LED Grow Light [Re: chris606]
    #600870 - 12/11/11 12:05 AM (4 years, 11 months ago)

Yeah, if you only want a few grams of bud at harvest.
Otherwise more light would be needed.
How many square feet are you planning on working with?


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Offlinechris606
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Re: 14 Watt LED Grow Light [Re: Stoneth]
    #600876 - 12/11/11 12:27 AM (4 years, 11 months ago)

48"x24"x60" grow tent but at this point and time  its slow going waiting on the moms to get biger for cloneing


Edited by chris606 (12/11/11 12:38 AM)


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Offlinegrod31
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Re: 14 Watt LED Grow Light [Re: chris606]
    #600881 - 12/11/11 01:05 AM (4 years, 11 months ago)

would that even keep a veging plant alive?


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Re: 14 Watt LED Grow Light [Re: chris606]
    #600884 - 12/11/11 01:44 AM (4 years, 11 months ago)

Quote:

chris606 said:
48"x24"x60" grow tent but at this point and time  its slow going waiting on the moms to get biger for cloneing



I'd feel safe saying you need more light.
In that size space at least 400 watts. Tho two 400 watters would do killer in there.
A 14 watt LED might do a square foot well if you were lucky.


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Offlinechris606
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Re: 14 Watt LED Grow Light [Re: Stoneth]
    #600889 - 12/11/11 02:09 AM (4 years, 11 months ago)

well what about a 6 Lamp 4Ft T5 HO Fluorescent Tube 3000K Grow Light Bulb

i been reading some other  forums and a lot of ppl say that do dam good with T5s


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Re: 14 Watt LED Grow Light [Re: chris606]
    #600901 - 12/11/11 02:49 AM (4 years, 11 months ago)

They do alright I guess.
Seen some nice grows done with them.
But you're still looking to run 400 to 800 watts to do well in that size space.


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OfflineHempMaster
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Re: 14 Watt LED Grow Light [Re: chris606]
    #600904 - 12/11/11 02:53 AM (4 years, 11 months ago)

Quote:

chris606 said:
well what about a 6 Lamp 4Ft T5 HO Fluorescent Tube 3000K Grow Light Bulb

i been reading some other  forums and a lot of ppl say that do dam good with T5s




I have a sunblaster 200w 6500k CFL and so far its great for my mom plants, vedging plants and clones. I read when u flower if your using cfl's u want 3000k and less. There's have another version of the 200w sunblaster that's at 2500k which i herd is great for flowering if you are using cfl's.


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OfflineOrgoneConclusion
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Re: 14 Watt LED Grow Light [Re: grod31]
    #601096 - 12/12/11 12:42 PM (4 years, 11 months ago)

Quote:

grod31 said:
would that even keep a veging plant alive?




Here is my from seed plant grown under a single 3w LED under my infamous 5 gallon inverted bucket lamp and nothing else:




Here it is under a 6w LED:





It grew to 18" (not stretchy) and turned out to be a male. Too tall for my secondary makeshift grow space, so I put it down.

Then I grabbed a small clone a few weeks into flower and here she is at 12" almost finished under 14w of LED. A 3w, a 5w and a 6w:




Same plant; same day:




Bucket lamp off:






Bucket lamp on (way too bright to look at - the camera dims it way down):



You can see that there was a place for a fourth socket and bulb, but the socket was broken so I didn't bother this time.


Note that the key is that these are narrow angle 30 degree spotlights so that very little light is wasted. Hoping for a half zip or the fabled 1g per watt. They are roughly equivalent to a CFL of 3-4 times the wattage when used in this manner.

Next grow I will do a start to finish on the same plant to show what is possible if I can keep it small.


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OfflineOrgoneConclusion
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Re: 14 Watt LED Grow Light [Re: OrgoneConclusion]
    #601099 - 12/12/11 12:50 PM (4 years, 11 months ago)

Forgot to mention the the plant is also in a five gallon, reflectix-lined bucket - hence the height limitation. I have a 'regular' flower room. Bucket lamps are perfect for seedlings, clones and experiments.


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Offlinegrod31
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Re: 14 Watt LED Grow Light [Re: OrgoneConclusion]
    #601101 - 12/12/11 12:56 PM (4 years, 11 months ago)

you surre showed me
awesome bro that's good shit.
makes me more optimistic about LEDs being used in our hobby.


--------------------
DO NOT USE mushmagic.com- THEY LIE AND SELL DRUGS TO CHILDREN :thumbdown:
--------------------------------------------------
Back the tape up.  I need it again!
Let it roll!  Just as high as the fucker can go! 
And when it comes to that fantastic note
where the rabbit bites its own head off,
I want you to THROW THAT FUCKING
RADIO INTO THE TUB WITH ME!
    Not me.  It would blast you through
the wall stone dead in ten seconds and they'd make me explain.


Post Extras: Print Post  Remind Me! Notify Moderator
OfflineOrgoneConclusion
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Re: 14 Watt LED Grow Light [Re: grod31]
    #601104 - 12/12/11 01:22 PM (4 years, 11 months ago)

I have built several component LED lamps as well as using different commercial grow lamps. My main flower room is a mix of top shelf red white and blue component LEDs. The problems as I see it are threefold:

1. Monochromatic LEDs have much lower luminous efficacy than white LEDs. Whites are available (at high cost) at efficiencies up to 130 LPW where as most red and blue are in the 20 to 30 LPW range. The spotlights are about 80 LPW.

2. Color mixing. A plant needs multiple frequencies at the same time. Shining red light on one leaf and blue on another will work OK, but not nearly as well as both colors hitting the same cells at the same time. No matter how well the LED is designed, color mixing is only optimal at a single focal length. Leaves above and below that will not have correct mixing.

Also no one really knows what frequencies are optimal. Even plant biologists have not come to a consensus. There are two band, three band etc., up to 11 band LED lamps on the market. White LEDs give you some of just about every frequency.

3. Beam angle. One area where LEDs shine (OK - bad pun) is that they are the only lights currently available in various beam angles without reflectors. All others are 360 degrees. So by using a 30 degree lamp properly, that means it has 12 times the photonic concentration. Of course the trade off is a smaller foot print, but put a picture of any almost grow and I will show you wasted light. Vertical HID grows are so successful because they are surrounded by plants. Of course, they are very wasteful until the plants fill out.

I got a kick where one guy had 3 baby seedlings under 180 watts of CFLs and asked if it was enough. This is not unusual. He was wasting about 98-99% of the light. I pointed out the 3 each 1 watt LEDS were more than sufficient.


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Offlinechris606
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Re: 14 Watt LED Grow Light [Re: OrgoneConclusion]
    #601130 - 12/12/11 04:25 PM (4 years, 11 months ago)

ty guys


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OfflineOrgoneConclusion
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Re: 14 Watt LED Grow Light [Re: chris606]
    #601141 - 12/12/11 06:26 PM (4 years, 11 months ago)

To better answer your original question: A 14w commercial grow light will fail.


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