Matching Drivers and COBs

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mduke

Well-Known Member
@SupraSPL Im considering purchasing 2 meanwell HLG-240h-C1050 and running 7 CXB3590s per driver based off your data sheet. Should I worry about any issues with this, since it's right on the edge? I get confused because these drivers will run the COBS at more than 1050mA when the pot is turned all the way up and don't know how this would factor into the question I'm asking.

also, to the best of your knowledge what is the µmol/J for a 3500K CXB3590? 4.75?
 
SupraSPL

SupraSPL

Well-Known Member
Yes you should be able to get full current or even slightly above. I estimate your COBs would be 237.3V once warmed up. The driver maxes at 238-239V. If your driver is a B version it is probably capable of 1090mA. If It is an A version possibly as much as 1150mA. The driver will self limit the current so that the COB voltage maxes its maximum. So there is no way to know exactly the max current you will get until you hook it up, but I think it is safe to say you will get at least 1050mA.

The 3000K 80 CRi is 4.66 umol/s/PAR W and the 4000K 70 CRi is 4.53. I expect the 3500K will be somewhere in between. I have been using the figure of 4.65 since the CRi and SPD are similar, but now that we have the actual SPD thanks to @welight /Mark/Cutter, maybe our calculus guru @alesh can give us a better estimate and LER. Not sure this graph is detailed enough but Mark might have the CSV data?

CXB3590 3500K 80 CRi SPD 3375K.png
 
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alesh

alesh

Well-Known Member
SupraSPL said:
Yes you should be able to get full current or even slightly above. I estimate your COBs would be 237.3V once warmed up. The driver maxes at 238-239V. If your driver is a B version it is probably capable of 1090mA. If It is an A version possibly as much as 1150mA. The driver will self limit the current so that the COB voltage maxes its maximum. So there is no way to know exactly the max current you will get until you hook it up, but I think it is safe to say you will get at least 1050mA.

The 3000K 80 CRi is 4.66 umol/s/PAR W and the 4000K 70 CRi is 4.53. I expect the 3500K will be somewhere in between. I have been using the figure of 4.65 since the CRi and SPD are similar, but now that we have the actual SPD thanks to @welight /Mark/Cutter, maybe our calculus guru @alesh can give us a better estimate and LER. Not sure this graph is detailed enough but Mark might have the CSV data?

View attachment 3582032
Click to expand...
Yeah the graph definitely isn't in full HD, the source data would be awesome. I'll try this one later once I have some time. I had to reinstall Windows so I'll have to download Digitizeit and all the other stuff.
 
M

mduke

Well-Known Member
captainmorgan

captainmorgan

Well-Known Member
Thinking of upping the power on one of my 3590 lights to compare yields between the two power levels. I'm looking for the highest efficiency driver in the 1050ma range that will meet my needs. CXB3590 CD 36v are the COBs and I have 9 of them. I like the single driver per COB but am open to a driver that would power 3 of them or possibly 4 to 5.
 
captainmorgan

captainmorgan

Well-Known Member
I have 5 of the LPC-60-1050's and could buy 4 more but not sure how efficient they would run with these COBs?

What are the pros and cons of series vs parallel if any?
 
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