Why do some guys wats to still use mono led with cobs?

Add mono's to cobs?

  • Total voters
    116
littlejacob

littlejacob

Well-Known Member
Bonjour
730nm are used at light off for 10mn to help plants sleeps faster...it will shorten bloom and you will be able to run 13.5/10.5 to get better yield faster!
I heard people use it for flowering but it should work for vegg too imo!(20/4)
CU
 
ttystikk

ttystikk

Well-Known Member
PurpleBuz said:
I get definite increases in frost compared to a 3000K light that doesn't have any supplemental blues. I also get prettier colors. What I don't know is which wavelengths in the 380 - 440 range are better than others. I'v stayed away from UVBs just cause of the potential damage for both me and the plants if overdosed
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The studies I've seen all mention 315nm as the target to hit for resin production. Same study said UVA wasn't helpful, but idk.
 
P

PurpleBuz

Well-Known Member
ttystikk said:
The studies I've seen all mention 315nm as the target to hit for resin production. Same study said UVA wasn't helpful, but idk.
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yes I have seen that, but I'm working on a basis of caution AND I am absolutely certain that higher wavelengths 385-440nm are making a significant difference in flower quality, since I have seen it in my own grows. That's good enough for me. Its not worth me hurting myself or damaging the plants cause a timer failed for a wee bit of extra resin.

Also consider the liability and work hazard of lights with excess UVB.
 
ttystikk

ttystikk

Well-Known Member
giantsfan24 said:
So...

Was there ever a consensus about what monos would be best to supplement white cob's for flower? My thinking was that if add them to the heatsink on their own circuit and turn them on and off when I needed them if have a dual purpose light. Then perhaps instead of 3500's, go up to a cob more blue heavy for veg. (Maybe I'm thinking too much like an HID grower?)

I read the entire thread... You guys are a crack up lol. Most of the important threads usually go the same way... Great, great info followed by bashing followed by videos then trolls like me getting to the party late asking questions that may or may not get answered.

This is by far the best site I've ever been a member of. You guys rock!
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PurpleBuz said:
yes I have seen that, but I'm working on a basis of caution AND I am absolutely certain that higher wavelengths 385-440nm are making a significant difference in flower quality, since I have seen it in my own grows. That's good enough for me. Its not worth me hurting myself or damaging the plants cause a timer failed for a wee bit of extra resin.

Also consider the liability and work hazard of lights with excess UVB.
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Using low power UVB sources will allay your safety concerns, and proper UVB levels can be achieved using low power sources on all day. It's UVC that's nasty, some of the florescent lamps do emit it so be careful.

After I've dialed in my current plate of technological spaghetti, I'll be getting 315nm specific sources to play with. I don't want any other part of the UV spectrum unless it's shown to be beneficial. That's why I'm interested in your results with it.
 
G

grouch

Well-Known Member
I'm guessing it will be a uv based cob instead of the 450nm (unsure of exact nm) we get from manufacturers now. Sds posted something awhile back about the cob technology possibly heading that direction.

I'm going to kick it old school with my cxa-3070 3000k AB's for a little while and see what comes out next. I thought about dropping some 365nm diodes down close to the canopy on some bars or a t5 reptile bulb but I may wait.
 
URSA LED

URSA LED

Well-Known Member
Hey All,

Our team has been reading these comments, and we love comments. You guys will help us perfect the product.
Regarding UVB - we will be the first Flip Chip COB company to produce high power UVB chips - we are looking at 2-3 months before we'll have anything to show.

We have setup our dark room and our one of our handheld lab grade ppfd meters came in. We're using the newest and latest LI-COR PPFD measurement system, and we are having something even better custom built later on. We also have state of the art spectrum filters that filter out spectrum ranges. That way, we can accurately compare each spectrum peak power.

We'll begin testing tomorrow.
 
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