Bro when it comes to cobs six has put the work in. I'm just running 250watts across 5 cobs and they are awesome. Of course will be upgrading to 400watts across 7 cobs in a 3x3 area. Will have a dimmer. Can't go wrong with the cobs bro. Six knows his shiit
yeah, I can see why the 5 Vero COBs wouldn't light, the additive voltage drop across the 5 COBs are right at the maximum output voltage of the driver.
I was looking at the rapidled.com site and yes their Cree COBs are much cheaper (under $40) but the Vero29 are even cheaper (under $30) but unfortunately they only have 3500k.
they do have a wide variety of drivers, even the hlg-320h-c1400b ($99) with a 229v constant current output which would drive 3 69V Vero29
i like them both.cree is good for under 50w and the vero are good above 50w.i like that the vero doesnt need cob holders and really they have a built in reflector the way they shape their cob frame.3500k is a good all around color for both flower and veg,alot of guys prefer the 3500k for flower.if you want more red get the 90 cri if you can find them.i guess my fav is the cree 36v in 2700k and 3000k.i built some 5 cob bars with 3 x 2700k and 2 x 3000k cree and those grow some dank buds.but i cant complain about the 3500k setups i have either loloh, seeing that you have used both Cree and Vero29, which do you like the best and is the Cree worth the extra $10+ each.
AND
most importantly: did you get anything last fall hunting?
yeah man i have been buying alot of my stuff there.if you do make an order be sure to use "growmau5" at checkout in the coupon code area for 5% off your total.
i like them both.cree is good for under 50w and the vero are good above 50w.i like that the vero doesnt need cob holders and really they have a built in reflector the way they shape their cob frame.3500k is a good all around color for both flower and veg,alot of guys prefer the 3500k for flower.if you want more red get the 90 cri if you can find them.i guess my fav is the cree 36v in 2700k and 3000k.i built some 5 cob bars with 3 x 2700k and 2 x 3000k cree and those grow some dank buds.but i cant complain about the 3500k setups i have either lol
shot a decent but smaller buck early on and a nice fat doe last day of the season.
@DrMcSkunkins I'm here doing it and I'm testing Phillips 3030 leds as well and I have some CXB's that are 97CRI I'm been testing
my prefered setups for cobs are still 35w cree driven with a meanwell hlg-185h-c1050b because you can put 5 cree on a single driver of this type and efficacy is close to 60%
Well im not at 35w per sq ft,its closer to 20w per sq ft with my layout maybe 25w psf if you count the uv lamps and 660 that run 4 hours a day lol.so you are basically saying you prefer 35w per sqft for bloom. When figuring out the LED power usage per sqft, is there a point of diminishing returns? I've seen people talk about 50w per sqft, is that better for blooming? is there a point of ridiculous like "I have 1000w per sqft and I produce buds the size of volkswagons!!!"?
what I'm trying to find out is: is there a sweet spot for watts per sqft that will produce well? The more desired watts per sqft is more upfront cost and also more costly to run. And, according to your quote, you are pretty happy with your 35w per sqft results (your pictures prove that };-))
Yeah its a topic that has been gone over alot and nobody has an answer for it lol.meanwell must be using inrush current as some type of disclaimer or some shit.i have 4 x hlg 240-1400ma and 2 x hlg 185-1050ma on 1 20 amp circuit no problems.most the time i try to only put 3 or 4 drivers per breaker but shit happens lol.lots of guys put 2 or 3 dricers on a single 15 amp breaker as well.i run all my drivers on 240v so they use half the amps. Been doing alot of wiring lately for my new shop and got to reading the stats on my square D breakers,the 20 amps have a max rating on the side that says 10,000 a so im thinking it takes a big spike to trip these newer style breakers.Thanks Sixstring, I'm probably going to shoot for 35w per sqft.
last question... I think };-) With the meanwell drivers, I was looking at the technical data sheets and there is a footnote that says "can only have two of this type driver on one 16A (16 is a weird number for a household circuit)household circuit, I looked at the input current spec at full load and says 2Amps I don't understand that footnote... have you run more than 2 HLG drivers on the same house circuit? I asked some of the EEs at work and they didn't understand it either...
Thanks
yeah most of the bigger meanwells are just a bit more efficient at 220-240v then they are @ 120v so its a good idea.yeah, the specs say something to the effect of 75a cold start current for 700 uSec or something like that. That's kind of what I figured and yeah, modern circuit breakers can take a crap load of instantaneous current. if I have to run a circuit over to the bloom tent, I might as well use 220 too, makes sense to me...
thanks again
yeah most of the bigger meanwells are just a bit more efficient at 220-240v then they are @ 120v so its a good idea.
i use 2 of these to control my entire flower room,then wire up a bunch of 240v duplex outlets off of those timers.what do you use for a lighting timer for the 220v meanwells?
so here's my preliminary thoughts about a lighting system in the 4 x 8 bloom tent:
each unit will be
6 - BXRC-35E10K0-D-73-SE COBs 3500k 80cri running on 1050ma constant current @27.00 each
6 - pin passive heatsinks @18.50 each
1 - HLG-240H-C1050 @69.00
total lighting cost per unit ~342.00
so adding $58 for miscellaneous parts (wire, frame material, nuts and bolts, ...)
talking $400 per unit
from the bridgelux spec for those COBs:
1050 - typical constant current
35.4 - typical Vf at 25c
37.2 - typical power at 25c
6911 - typical flux in lm
6734 - typical DC flux lm
186 - efficiency lm/w
If I build 3 of these units to fill a 3 x 6 area, I'm thinking I can service the 6 plants per bloom cycle that I want for ~$1200
can anyone spot any flaws in this logic? am I missing anything?
I think 37w per cob power consumption won't really generate a ton of heat
I'm just spit ballin here, all comments are welcome
Its a good plan as long as that driver will in fact power 6 vero.im not home so i cant check the volts.i run a ton of cree @ 35w and they kickass @ 10 to 12in spacing.
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