Veg addition to 3000K CXB3590

Getgrowingson

Getgrowingson

Well-Known Member
Ok so i have all my parts for my cxb3590 light infront of me and then i was thinking sheit i ordered the 3000k and was thinking about vegging with them as well for my first run.
I was thinking of maybe supplementing with some stars or something of the like for veg with the 3000k dimmed then when flower comes shut down the blues and crank up the 3000k.
If so what color temps should i get? or should i just build a 4 CXB3590 5000K light to veg in my 4x4? what do the nerds of the led world reccomend?( not being a dick here just respect what most of you guys are doing here and dont want to learn the hard and expensive way lol. Thanks agin guys!
 
P

PurpleBuz

Well-Known Member
my strategy has been to supplement the 3K with some royal blue stars, and then during flower after the initial stretch is done, add some deep red (660nm) + UV. no separate dedicated veg light
 
P

PurpleBuz

Well-Known Member
Getgrowingson

Getgrowingson

Well-Known Member
So is that what you would recommend? Or would you add some other blue and maybe a 5000k white? Was thinking about getting a couple stars between the cobs. What would you recommend? And what % of blue to 3000k cobs?
SupraSPL said:
The highest efficiency deep blues that I know of, 60% @ 700mA (2W)
http://shop.stevesleds.com/Philips-Luxeon-ES-ROYAL-BLUE-3-Watt-LEDs-8794102476.htm

Doesn't take many of those to bump up your blue % but the downside is increased complexity/wiring etc.
Click to expand...
 
SupraSPL

SupraSPL

Well-Known Member
PurpleBuz said:
can the luxeon royal blues be run safely at 1000mA ? Maybe able to run them inline with the cree cobs at 1000mA to minimize increased complications\wiring.

how much efficiency would be lost ?
Click to expand...
Yes you could run them at 1A, efficiency 53.8%. That would reduce wiring but to be able to switch them off you would need to install bypass switches.

Getgrowingson said:
So is that what you would recommend? Or would you add some other blue and maybe a 5000k white? Was thinking about getting a couple stars between the cobs. What would you recommend? And what % of blue to 3000k cobs?
Click to expand...
That is a tough one to answer and may depend on your setup. I have experimented with straight 3000K and red/white/blue. Both work great for flowering. Some growers have reported 3000K is OK for vegging, others complain of excess stretch. Some have reported that 4000K is OK for flowering.

So there does not seem to be a consensus. If you are growing a stretchy sativa dom and the stems are thin and floppy, it may be beneficial to run with more blue in the mix and try to beat the plants up to toughen the stems. But for stocky indica doms you might want to encourage more internode distance and maybe straight 3000K would be a way to do that.
 
Actionbone

Actionbone

Well-Known Member
SupraSPL said:
Yes you could run them at 1A, efficiency 53.8%. That would reduce wiring but to be able to switch them off you would need to install bypass switches.



That is a tough one to answer and may depend on your setup. I have experimented with straight 3000K and red/white/blue. Both work great for flowering. Some growers have reported 3000K is OK for vegging, others complain of excess stretch. Some have reported that 4000K is OK for flowering.

So there does not seem to be a consensus. If you are growing a stretchy sativa dom and the stems are thin and floppy, it may be beneficial to run with more blue in the mix and try to beat the plants up to toughen the stems. But for stocky indica doms you might want to encourage more internode distance and maybe straight 3000K would be a way to do that.
Click to expand...
I want to test similar idea cxb3070 4000k + 630 reds in the same driver but not clue how to do the bypass to run reds only when i want.
 
P

PurpleBuz

Well-Known Member
SupraSPL said:
Yes you could run them at 1A, efficiency 53.8%. That would reduce wiring but to be able to switch them off you would need to install bypass switches.
.
Click to expand...
The bypass wire\switch is a really cool and simple method! thanks for the info. Although I wouldn't turn the blues off, I generally add some deep reds + Far reds(sep timer) once the initial stretch is over. Could I safely reduce the current to the blues by putting a couple in parallel or add a resistor to a bypass loop ? parallel wiring of leds scares me, might run away

The extra blues definitely help for a frostier and denser bud. When my friends show me their flowers I can tell if they are grown under HPS, cause of the density and the frost.
 
alesh

alesh

Well-Known Member
SupraSPL said:
The reds/blues would be in series with the COB, so you can solder in a wire that bypasses the reds/blues. So when the switch is open the reds are on and when you close it the current will flow through the bypass wire and switch rather than through the reds.

View attachment 3442011
Click to expand...
Is this safe?
It occurs to me that the COB is exposed to higher voltage than needed when you turn the mono LEDs off. If there's enough mono LEDs couldn't this damage the COB?
 
Last edited:
Rahz

Rahz

Well-Known Member
Honestly, the 3000K will be fine for veg. I've been filling 28x28" spaces with single plants in 3 weeks using 3000K in hydro. I have a second lamp which in veg mode runs at 3700K. I have noticed slightly tighter branching under that temp, but in either case some pruning is needed in addition to topping and lollypopping. In either case you will have bushes that need management and not some stretched out stalk.

I will also tell you that my dankest gnarliest stuff was flowered under the 3000K lamp. Finger hash from handling the stems, and cured bud that turns into hash nuggets when ran through a grinder. I'm not saying there's no truth to the idea that 4000K will produce frostier... I am but one grower among many, but until I see side by sides with color temp being the single variable, I will question it.

At any rate, I wouldn't recommend spending a bunch of money to alter the color if you've already got CXBs at 3000K. Light them up and veg and flower under them. Check your results and then maybe do something different for comparison, but I'm telling you it's not a huge issue. 3000, 3500, 4000... it's all good.
 
You must log in or register to reply here.
Top