Better Veg Spectrum

Rivendell

Rivendell

Well-Known Member
For all you guru's out there, Which of these two options would provide a better veg spectrum?

Samsung 301b's: 4k with added blue or 4k with added red?

I know that typically blue is the go to for veg, but I have seen some discussion of the benefits of 660nm on vegging plants as well. Does 4k already have enough blue and would benefit from some red added back in or is stacking blue the way to go? Or should I nix the added colors and go straight 4k?
 
PJ Diaz

PJ Diaz

Well-Known Member
I run straight 4k and it works fine for veg. I'd say the choice of added red or blue might depend on your specific situation. If you are running naturally tall stretchy plants and you want to keep them a bit more compact go with the added blue. If you are running a squat indica and you want it to stretch out a bit more, add red.
 
Rivendell

Rivendell

Well-Known Member
Thanks for the input fellas, Appears that there isn't much consensus on this question. I am just a small hobby grower so it probably doesn't make a ton of difference either way, but I wanted to see what others had to say.
 
BobThe420Builder

BobThe420Builder

Well-Known Member
You had 3 replies


Google veg and blue spectrum in QBs

Makes a big difference...do it

All I run are QBs , wish I had blue in veg and red in Flower on mine
 
L

loco41

Well-Known Member
Rivendell said:
Thanks for the input fellas, Appears that there isn't much consensus on this question. I am just a small hobby grower so it probably doesn't make a ton of difference either way, but I wanted to see what others had to say.
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I bought some of these 2700k 90cri to mix in with some standard 4k strips. I have no experience with either yet, but thought it was a cheap way to be able to try out a different spectrum. They are far from efficient and not the newest tech, but for a pretty minimal cost, you could try plain 4k vs. the 4000k+2700k 90cri spectrums and also have some control over spectrum for the specific plants/strains you are working with like @PJ Diaz was saying.
 
pulpoinspace

pulpoinspace

Well-Known Member
if you do go with LED for veg. go cheap. you don't need added blue. get the 4000k. and run them SOFT or you will see veg deficiencies and 3 finger leaves. like 15w per square foot or less. if you don't have a lot of vertical space and want a more fool-proof veg light see my recommendation in post #4. 6400k flouro is a tried and proven veg spectrum and flouros can be much closer to the plants.
 
mauricem00

mauricem00

Well-Known Member
Rivendell said:
For all you guru's out there, Which of these two options would provide a better veg spectrum?

Samsung 301b's: 4k with added blue or 4k with added red?

I know that typically blue is the go to for veg, but I have seen some discussion of the benefits of 660nm on vegging plants as well. Does 4k already have enough blue and would benefit from some red added back in or is stacking blue the way to go? Or should I nix the added colors and go straight 4k?
Click to expand...
my 400k bridgelux stips veg well.adding a fs plus uv. seems to improve vegging and flowering. https://www.amazon.com/dp/B07GBRKXPS/?coliid=IQH359VASXSVU&colid=AW7UKM9ED6GM&psc=1&ref_=lv_ov_lig_dp_it but this is a 1 plant closet grow. I still prefer T5s but LEDS are fun to play with.
 
mauricem00

mauricem00

Well-Known Member
Rivendell said:
Thanks for the input fellas, Appears that there isn't much consensus on this question. I am just a small hobby grower so it probably doesn't make a ton of difference either way, but I wanted to see what others had to say.
Click to expand...
looking at the different lights on the market there seems to be no consensus among LED makers. this is a new and evolving technology. in time we may have true full spectrum lights using 385nm diodes driving an RGB phosphor
 
PJ Diaz

PJ Diaz

Well-Known Member
pulpoinspace said:
if you do go with LED for veg. go cheap. you don't need added blue. get the 4000k. and run them SOFT or you will see veg deficiencies and 3 finger leaves. like 15w per square foot or less. if you don't have a lot of vertical space and want a more fool-proof veg light see my recommendation in post #4. 6400k flouro is a tried and proven veg spectrum and flouros can be much closer to the plants.
Click to expand...
I think what you mean is flouros HAVE TO BE CLOSER TO THE PLANTS. I vegged with flouros for a while before upgrading to LED, and I was amazed at how much more light a LED board at 100watts puts out to a 100watt flouro fixture. It's literally like double the light output for the same wattage.
 
pulpoinspace

pulpoinspace

Well-Known Member
PJ Diaz said:
I think what you mean is flouros HAVE TO BE CLOSER TO THE PLANTS. I vegged with flouros for a while before upgrading to LED, and I was amazed at how much more light a LED board at 100watts puts out to a 100watt flouro fixture. It's literally like double the light output for the same wattage.
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haha yeah exactly. as long as you know what you're getting into. i had 4 cobs@20w each in my veg tent and my plants were constantly complaining about too much light. switched to 200w flouro fixture and all problems went away.
 
Medskunk

Medskunk

Well-Known Member
Definately 6500k for veg. It just flows better.

pulpoinspace said:
haha yeah exactly. as long as you know what you're getting into. i had 4 cobs@20w each in my veg tent and my plants were constantly complaining about too much light. switched to 200w flouro fixture and all problems went away.
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With the cobs its +10 degrees as they switch on. If you dont run co2 they need good distance from the tops. Nice plants with them, getting those colors from mid flower without trying :blsmoke: Beauties
 
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