CobKits
Well-Known Member
real hard to beat those for a first rig. and then youre in the 28mm platform and have an easy upgrade to the citi gen7 or luminus gen 4 in a year or two
More Cobs at lower watts or less Cobs at higher watts
- Thread starter ganjafather27
- Start date
CobKits
Well-Known Member
youre in the right place, ask away.
i guess to simplify all chips follow similar efficiency trends based on how hard you run them, so it comes down to chip selection, i.e. which family delivers the best PAR/$
id have to put citi1212 gen5 (because they are on super sale), citi gen 6 1212, and luminus cxm22 at a near tie here. the former if you want to use more chips because you have time to drill tap and are using bar heatsinks, the latter if you want to get up and running quick at 75W/cob with good efficiency
ganjafather27
Well-Known Member
Sweet. I really appreciate your expert knowledge, and I feel confident in this build now.
I'll order the chips probably later today.
But lastly, I found some undrilled 140x70 pin Heatsinks from China that are real cheap... Do you need a drill press to drill and tap them or can I use a standard hand drill?
If I'm running 4 36v cobs on hlg185h-c1400s, what size pin Heatsinks would be right? Can I go down to 120mm or 130mm as opposed to the 140mm and be fine?
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RandomHero8913
Well-Known Member
120mm is fine for 1400ma
CobKits
Well-Known Member
theyre always cheap in china, get a shipping quote you'll prob need to order a certain amount to cover the shipping
you could hand drill. a $50 drill press from harbor freight will do better and get used
yeah 120s are fine
ganjafather27
Well-Known Member
whytewidow
Well-Known Member
CobKits
Well-Known Member
1216 gen6 would be a 10% performance bump for $60 but honestly id just keep the perfectly good 3050s and those coolie reflectors. or remove 2 or 3 of the drivers and wire either 2 pair in parallel to 2 drivers (900 mA/cob) or all 4 cobs in parallel to one driver (450MA/cob)
youd bump way up in efficiency and it would be an awesome veg light
youd bump way up in efficiency and it would be an awesome veg light
...........cobby should carry those, hint
ganjafather27
Well-Known Member
hey cobkits, does color temperature make a big difference? I'm piecing 2 builds, 1 for flower and a separate unit for veg. I was thinking a mix of 2700k and 3000k for the flower tent and a mix of 4000k and 5000k for the veg tent. What would you suggest?
Also, am I fine to mix gen 5 and gen 6 clu048s on the same driver?
Thanks cobby
CobKits
Well-Known Member
yes it makes a difference but depends on what you are trying to do.
2700k is not all that different than 3000k
3000k is not all that different than 3500k
3500k is not all that different from 4000k
4000k is not all that different from 5000k
2700k is not at all close to 5000k
id keep it simple. 3000k 90cri for flower, 4000k 80cri for veg. nothing you cant do with those spectra
in series its fine. in parallel the voltages are different enough that its not advised. might work, might not. in any case the gen6 would prob pull more current and your lighting would be uneven as the gen 6 could be 10% or more brighter as the gen 5
at constant current in series the lower voltage of the gen 6 would result in more similar output to the gen 5s (gen6s would be 5% more efficient in this case, but the overall lumens/par per cob would be closer than that
havent tested that, just my gut feeling
ganjafather27
Well-Known Member
Sweet thanks for the reply. I got a little antsy yesterday and bought them anyway. I'm glad I ended up going all Gen 5 though.
Went for mostly 3000k for flower, with 4 of the higher efficiency model, 4 90cri 3000k and 4 90cri 2700k.
For the veg light I got all 4000k
Went for mostly 3000k for flower, with 4 of the higher efficiency model, 4 90cri 3000k and 4 90cri 2700k.
For the veg light I got all 4000k
Salah82
Active Member
sent you a message brother
Salah82
Active Member
Alrighty