Citizen 1212,1818 or ? for 4x4 tent?

HotBunz

HotBunz

Active Member
So after endless reading and looking over countless kick ass grows I just can't decide on my next COB built. I have a good ol' 4x4 tent that I am trying to up fit with all COB lighting. I currently had a 200w 4 COB Cree cxb3590 rig that I am using in a 28"x53" tent but and getting ready to put up my 4x4 tent that is waiting in it's box.

My plan is to start on another 200w'ish fixture and add more as my budget allows. I would really like to get away from Cree's due to the cost of the chips themselves. As I said I am not building a full tents worth of lights at this point but I am looking at the end game down the road and looking for the best coverage for the sq footage I am working with.

1 plan was to run CLU-1212's at 1400ma and build fixtures with 4 COBs each @200w with hlg-185h-c1400 drivers.This would work out to about 37w per sq ft. with 3 units. Good but I think I want a little more than that. So was thinking about the CLU-1818's on a hlg-240h-c1400. I think that would give me 218w per fixture with 3 COB's, 3 fixtures in the tent would give me just a tick over 40w per sq ft. Then of course there is the Luminus CX22's again on the hlg-240h-c1400 they seem to work out to 226w per 3 COB fixture and 3 fixtures total would put me in the 42w per sq ft. range. I could of add in my current Cree 200w fixture but it was my understanding that over 50w per sq ft is overkill.

My head is just spinning with so many options. What are the pro's and con's of the above rigs? Am I missing something and should I look at other options to build?
 
CobKits

CobKits

Well-Known Member
1212s are good, 1818s and cxm22s are in a different class and i think they are worth the small additional investment once you consider heatsinks and drivers. particularly the cxm22 as they are only a few bucks more than the 1212 and do great out to 75W where 1212s start to fall off in efficiency around 50W

i will also put in a word for constant voltage drivers, the -48A is great as it can run the cxm or 1818 at either 4x55W or 3 x 75W, so its most flexible. on wattage per square foot it depends how hard you run them. at 75W per cxm/1818 id prob design at 40W/SF, at 50W per chip closer to 35W/SF is fine as you have both better efficiency and better coverage
 
HotBunz

HotBunz

Active Member
CobKits said:
1212s are good, 1818s and cxm22s are in a different class and i think they are worth the small additional investment once you consider heatsinks and drivers. particularly the cxm22 as they are only a few bucks more than the 1212 and do great out to 75W where 1212s start to fall off in efficiency around 50W

i will also put in a word for constant voltage drivers, the -48A is great as it can run the cxm or 1818 at either 4x55W or 3 x 75W, so its most flexible. on wattage per square foot it depends how hard you run them. at 75W per cxm/1818 id prob design at 40W/SF, at 50W per chip closer to 35W/SF is fine as you have both better efficiency and better coverage
Click to expand...
Which -48A are you referring to? I assume the HLG-185H-48A can not drive cxm22's being they are a 50v+ COB and the 185H-48A is 48v and tops out at 187w.
 
CobKits

CobKits

Well-Known Member
best criteria for meanwell longevity is case temp. if you can put your hand on it, it is significantly under the 70C limit so go ballz out. ill let you know if/when i get one back that failed. i see no reason to run them all the way out as your yield will overcome the maybe possible slight reduction from 20 year to 18 year life
 
N

NewBKind

Well-Known Member
CobKits said:
1212s are good, 1818s and cxm22s are in a different class and i think they are worth the small additional investment once you consider heatsinks and drivers. particularly the cxm22 as they are only a few bucks more than the 1212 and do great out to 75W where 1212s start to fall off in efficiency around 50W

i will also put in a word for constant voltage drivers, the -48A is great as it can run the cxm or 1818 at either 4x55W or 3 x 75W, so its most flexible. on wattage per square foot it depends how hard you run them. at 75W per cxm/1818 id prob design at 40W/SF, at 50W per chip closer to 35W/SF is fine as you have both better efficiency and better coverage
Click to expand...
Are the cxms comparable to cree cbx3590 at the same price per chip?
 
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