LED Requirements for 80cm x 60cm x 70cm tent

Olive Drab Green

Olive Drab Green

Well-Known Member
crispytriceps said:
Does this work: https://www.amazon.com/Horticulture-Lighting-Group-USA-Quantum/dp/B07C57J7XX/ref=sr_1_1_sspa?ie=UTF8&qid=1526887715&sr=8-1-spons&keywords=quantum+board&psc=1

It's plug and play right?
What is the max distance to plant this can be? Because it says 18in, if it's 18in how is it different from LED grow light panels?

Thanks
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Don’t buy anything from Amazon.

http://www.cobkits.com/
http://www.timbergrowlights.com/
http://www.horticulturelightinggroup.com/

Edit: I lied, that’s HLG, buy it.
 
Randomblame

Randomblame

Well-Known Member
What about LED tubes? The ones used to replace T8 / T5 flourescent tubes?

Osram and Phillips offer some highly efficient LED tubes.

A mix of 3000° and 4000°k tubes would be almost similar to stripes and the additional diffusers scatter the light so you could use the full height without getting burnings.

Am4zon/e3ay is full of cheap 2 and 4ft. 100lm/w noname LED tubes, Phillips has some 8w/2ft. tubes with 1080lm, which is at least 135lm/w. But they are of course more expensive!

You would have to screw the appropriate sockets on a wood board, they work with 110/220v AC. No starter and no ballasts are needed to run such tubes. You could switch individual tubes on and off by simply turning it in the sockets and with 8-10 pieces of 8, 9 or 10w tubes you can certainly achieve something.
 
Randomblame

Randomblame

Well-Known Member
Olive Drab Green

Olive Drab Green

Well-Known Member
Randomblame said:
What about LED tubes? The ones used to replace T8 / T5 flourescent tubes?

Osram and Phillips offer some highly efficient LED tubes.

A mix of 3000° and 4000°k tubes would be almost similar to stripes and the additional diffusers scatter the light so you could use the full height without getting burnings.

Am4zon/e3ay is full of cheap 2 and 4ft. 100lm/w noname LED tubes, Phillips has some 8w/2ft. tubes with 1080lm, which is at least 135lm/w. But they are of course more expensive!

You would have to screw the appropriate sockets on a wood board, they work with 110/220v AC. No starter and no ballasts are needed to run such tubes. You could switch individual tubes on and off by simply turning it in the sockets and with 8-10 pieces of 8, 9 or 10w tubes you can certainly achieve something.
Click to expand...
That one’s actually legit, I just didn’t realize HLG opened an Amazon store.
 
C

crispytriceps

Member
The EnviroGro T5 Grow Light 2ft, 4 T5, Lumen up to 8,000 would it work in my tent? Or is it not very gd/enough for it? Because I could buy this from the local store here.
 
C

crispytriceps

Member
Should I keep reducing the distance as the plant grows?
Since I have 27in total height, the pot alone would bring the distance down to 18 i suppose. When the plant grows the distance will be reduced no?
 
Randomblame

Randomblame

Well-Known Member
Something like this:
https://www.amazon.com/dp/B01C4N461E/ref=twister_B00R8SJ41S

crispytriceps said:
The EnviroGro T5 Grow Light 2ft, 4 T5, Lumen up to 8,000 would it work in my tent? Or is it not very gd/enough for it? Because I could buy this from the local store here.
Click to expand...


Should work! Tubes would allow to reduce the distance more as with the QB100. It's the same as with strips.
Are these LED tubes or T5 in the EnviroGro?
If you like the QB100's get one QB100 kit + a 2nd 4k board and run them in parallel on one 100w driver.
The more even coverage reduce the risk of getting leaf burns.
 
Randomblame

Randomblame

Well-Known Member
crispytriceps said:
Should I keep reducing the distance as the plant grows?
Since I have 27in total height, the pot alone would bring the distance down to 18 i suppose. When the plant grows the distance will be reduced no?
Click to expand...
You only need to reduce if you see light or heat stress on the leaves.
When I think of my old T8 times, the leaves have often touched the tubes without being damaged. Only at the ends were they so hot that they caused burns. T5 is more powerful and need at least 2-4" distance.
Diffuse covers can be really helpful with such a low height. Plants can grow up to a few centimeters with diffuser. A sanded acrylic glass plate could be fastened in front of the QB100's for instance.
You'll lose 8-10% intensity, but you benefit at the same time by up to 12% because of the diffused light.
So you do not really have a diffuser loss. And LED tubes are available with diffused covers.
 
Randomblame

Randomblame

Well-Known Member
I've seen an aquarium LED test where Philips used a diffused lens plate to eliminate parallel light waves and mix the different LED colors. The results of uniformity, distribution and spectrum were excellent.
Despite the diffuser, plants and corals grew better and optically the aquarium made a much better impression because of much less reflections and shaded areas.
I'll strap some pmma diffuser sheets(alibaba) onto my 150w-test rig(3ft²/47“ total height) and will do a few experiments with it. If that proves to be so useful as I think, I will also equip my other lights with it.
So what I mean is that you can probably use any lamp if you distribute the light better and diffuser plates are one way to archieve this.
 
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Randomblame

Randomblame

Well-Known Member
crispytriceps said:
Nice!
If I buy this panel, I wouldn’t need anything else to run it right? How high should it be from the plant? what is the maximum distance before it burns it?

Thank you!
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I would mount the light directly under the ceiling and use cropping techniques to keep the plant wide and bushy. 4-6" final distance should be doable without getting too much damage.
 
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