What cobs are good cobs?
- Thread starter Rob420Herbs
- Start date
Greenman218
Member
So i do want to go above 75w so sounds like Vero29 c or clu048 1818. I actually own a the v7 model from timber too and was the reason I bought the sst x heatsink, but was thinking there would be a better way to drive them or a way to use less drivers with same numbers? And also still have the clu048 to think about too. Also if I were to run a chip at 50 to 75w on that big heatsink would I see that big of difference and if I did would it be best to double the cobs per sqft for same numbers as well and how much penetration would I loose?
Olive Drab Green
Well-Known Member
Vero 29C Gen 7, or SE, 3500k, 90 CRI.
I dunno much about Citizens, but they’re good and cheap if you’re just looking for something that works. Cree CXB3590s are a bit outdated, but you can get 800-900 PPFD per emitter in an 18x18.
135w QB288 V2s are in the same ballpark as the Vero29C, slightly more efficient.
I dunno much about Citizens, but they’re good and cheap if you’re just looking for something that works. Cree CXB3590s are a bit outdated, but you can get 800-900 PPFD per emitter in an 18x18.
135w QB288 V2s are in the same ballpark as the Vero29C, slightly more efficient.
Greenman218
Member
I bought these sinks around 8 months ago and QB was new to me but for now I'm going to work with what I have so far! U mention 3500k , it's just for flower so wouldn't 3k work a little better? I was just at cobkits site and just realized you don't carry bridgelux. Do you stock them? My timber runs 4 cobs on 2 hlg180 1400ma and draws exactly 400. Is there a way to put more on a bigger driver with same results?
CobKits
Well-Known Member
go with the veros. (or clu058s but they dont fit your heatsink... so not a great option)
heres a test i did awhile back with older gen 5 citis, vero C, veroD, and luminus cxm22. gen 6 citi 18181s track closer to the cxm22.
as you can see the larger LES chips like vero C and CLU058 pull ahead by a few % relatively, above 70W
its up to you whether spending $33 on a vero C vs $19 on a CXM22 is worth it.... below 70W it seems like a waste. above 80W it makes more sense
Olive Drab Green
Well-Known Member
I think 3500k has better PPFD per energy, I believe I’ve read. Like, 3000k would work, too, with better red spectrum, but I just usually go 3500k for a well rounded spectrum.
Olive Drab Green
Well-Known Member
Always listen to this guy.
Greenman218
Member
Wow great chart! So really my choice would be between Vero and cxm22!! I see at 80 to 90w the vero is slightly more efficient but how much more? Don't really understand the ppfd/w how much more would Vero9c save vs cxm22 at 90 to 100w. And how much longer of life span would the vero have?
CobKits
Well-Known Member
its an arbitrary scale specific to that test but roughly
vero C at 90W = 9.3 PPFD/W
vero C at 95W = 9.25 PPFD/W
vero C at 100W= 9.2 PPFD/W
cxm22 at 80W = 9.25 PPFD/W
cxm22 at 85W = 9.15 PPFD/W
cxm22 at 90W = 9.0 PPFD/W
cxm22 at 95W = 8.9 PPFD/W
cxm22 at 100W= 8.8 PPFD/W
so at a given wattage the vero is 3-4% more efficient in that range
for a fixed efficiency youd need more cxm22 for same light
so for example, at 9.25 PPFD/W
10 CXM22@80W each = 800W
youd need roughly 8.5 veroCs at 95W to get same efficiency (yes 8.5 is impossible but just trying to keep the math simple
CXM cost = 10x$19 = $190 chip cost
vero cost = (8 or 9) x $33 = $264-$298 chip cost
ordinarily you would factor in the 1 or 2 extra heatsinks youd be buying but youd see the luminus still has an advantage... and for a given efficiency if spread out over more chips -> better coverage
so as you can see... bulk efficiency of chips isnt the only yardstick, cost is also a factor. of course below 75W its no contest as they are nearly identical in efficiency and luminus cost 60% as much
JinkysOars
Active Member
Last edited:
Greenman218
Member
I run my timber model 4vs at around 15 to 20" depending on if I have it dimmed or not. I thought timber was the only ones to use that heatsink!! Nice to know others using it as well, I like it!
Olive Drab Green
Well-Known Member
I use the 2VL at around 18”, and that might even be too close. They stay squat and knuckle up everywhere.
Greenman218
Member
Yea they do a good job. I also run cxb3070 and have a Amare 450uvb that does well but still like my timber 4vs better. Now I have to find the best deal possible need 24 vero29 gen7 c model and 12 meanwell 180h 1400b drivers!
RainDan
Well-Known Member
Hi @Greenman218,
Thanks for the nice post - I'd like to help you with your Vero/Meanwell needs - drop me an email and/or PM and I'd be happy to assist.
Have a good day.
Thanks,
Dan
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