6500k LED for veg

giantsfan24

giantsfan24

Well-Known Member
Hey riu peeps

I'm currently running a 3500k citizen light from Timber, that rocks btw, and am considering buying a 6500k CREE veg light in LED also.

I know this is a leftover from my hid days so I was wondering if anyone else is doing this with LED

Thanks!
 
CobKits

CobKits

Well-Known Member
most people find it to be too much blue. good supplement to make your flower lights bluer
 
giantsfan24

giantsfan24

Well-Known Member
CobKits said:
photoinhibition
short internodes

4000k 80 cri does well
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Thank you for the replies, I do appreciate it. Is the light spectrum that different between a 6500k LED vs 6500k HID? I know there are adjustments in the transition from hid to led.
 
Prawn Connery

Prawn Connery

Well-Known Member
It's one of the great cannabis myths that blue light is more efficient for veg. HPS always outperforms MH - even in veg - in terms of overall leaf and flower mass due to the extra red. Numerous studies have shown light in the 620-660nm range promotes faster growth. However, it also promotes internodal elongation.

The reason indoor growers started using MH for veg and HPS for flowering is because in the early days, everyone used MH for both veg and flower. As HPS evolved, it was discovered it could improve yields for the same wattage. But for indoor growers, it also caused their plants to stretch a bit more in veg (and flower), and so MH became the default veg light, as it kept vegging plants shorter and tighter, and HPS the default flowering light, as it produced the biggest yields.

Anyway, I've tried both 5000K and 4000K LED strip lights for veg, and the 4000K outperform the 5000K. The extra stretch is hardly noticeable, but the faster growth is.
 
giantsfan24

giantsfan24

Well-Known Member
Prawn Connery said:
It's one of the great cannabis myths that blue light is more efficient for veg. HPS always outperforms MH - even in veg - in terms of overall leaf and flower mass due to the extra red. Numerous studies have shown light in the 620-660nm range promotes faster growth. However, it also promotes internodal elongation.

The reason indoor growers started using MH for veg and HPS for flowering is because in the early days, everyone used MH for both veg and flower. As HPS evolved, it was discovered it could improve yields for the same wattage. But for indoor growers, it also caused their plants to stretch a bit more in veg (and flower), and so MH became the default veg light, as it kept vegging plants shorter and tighter, and HPS the default flowering light, as it produced the biggest yields.

Anyway, I've tried both 5000K and 4000K LED strip lights for veg, and the 4000K outperform the 5000K. The extra stretch is hardly noticeable, but the faster growth is.
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Prawn Connery...great nick lol! Awesome!

Thanks for this. I've been reading everywhere that what I've got has enough blue in it to be sufficient for full cycle and honestly the only stretching I'm noticing is when I dim them down below say 40% of full power for veg. At 50%, it's as tight, from an internodal standpoint, as can be.

My last grow wasn't very good. New light, from seed which I hadn't done in many, many years and had never grown from seed indoors, only clones. That got me thinking I might need more blue but I think I'll probably save my money for more cool seeds.

:-)
 
Prawn Connery

Prawn Connery

Well-Known Member
If you're using 3500K for flowering, I'd suggest going to 2700-3000K and using the 3500K for veg if you're looking to buy another light. Otherwise I agree with Dave455.
 
giantsfan24

giantsfan24

Well-Known Member
Prawn Connery said:
If you're using 3500K for flowering, I'd suggest going to 2700-3000K and using the 3500K for veg if you're looking to buy another light. Otherwise I agree with Dave455.
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Do you think there would be a noticeable benefit to going 2700-3000 in flower? All things being equal that is.
 
Prawn Connery

Prawn Connery

Well-Known Member
If you're already planning to buy another light, then yes, you would likely see a difference. All things being equal. Of course, there are many other variables in growing that could affect yield more than going from 3500K down to 2700-3000K, but all my flowering lights are 3000K and the new QB324 panels we are trialling have an even better spread of 620-660nm (red) light, being half CRI 80 and half CRI 90 3000K chips. The results look promising so far:

IMG_0314.jpg
 
Prawn Connery

Prawn Connery

Well-Known Member
Supplemental. There's no point throwing out a good light! More light (up to a point) is more important than temperature (colour). Again, all things being equal. Nothing wrong with 3500K if you've already got it.
 
giantsfan24

giantsfan24

Well-Known Member
Prawn Connery said:
Supplemental. There's no point throwing out a good light! More light (up to a point) is more important than temperature (colour). Again, all things being equal. Nothing wrong with 3500K if you've already got it.
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Yeah I've already got it and it's a great light. I'd rather stay with a cob just cause that's what I have so I'll give @RainDan a shout and see what he can work up for me to add some red-ish light. Thanks for all the help PrawnC.
 
OLD MOTHER SATIVA

OLD MOTHER SATIVA

Well-Known Member
giantsfan24 said:
Hey riu peeps

I'm currently running a 3500k citizen light from Timber, that rocks btw, and am considering buying a 6500k CREE veg light in LED also.

I know this is a leftover from my hid days so I was wondering if anyone else is doing this with LED

Thanks!
Click to expand...

these guys are too picky..sure 3000, 3500,4000 work..

i have use 5000 and they did just as good veg and flower

stop asking these guys questions..veg and flower with it and get back to us

"dammit Jim this isn't rocket science..justgive em the photons..they will sort ot out"
 
Go go n chill

Go go n chill

Well-Known Member
Prawn Connery said:
Supplemental. There's no point throwing out a good light! More light (up to a point) is more important than temperature (colour). Again, all things being equal. Nothing wrong with 3500K if you've already got it.
Click to expand...
I second that! 35k is an all around spectrum number. It is solid. Get picky later in the game.
 
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