Jack Reacher
Active Member
I like Timber Grow Lights. Already put together ready to mount on a frame of your design/choice. Takes all the guess work and extra expense out of it. Buy their's. You won't be sorry.
DiY LEDs - How to Power Them
- Thread starter SupraSPL
- Start date
Rocket Soul
Well-Known Member
Hi furalle
Ive been thinking about using the same heatsinks w vero @2.1, simply due to the simplicity of having everything predrilled and being able to get it in the eu with no customs madness (spain=kafka for this stuff).
How hot is very hot? Have you tried semiactive cooling, or having your oscillating fans, or whatever is your aircirulation on them? Any info appreciated as the only 100% way to get your heatsinks right seems to be to ask soneone who allready done it.
It was a while ago bit i think it was around 60-65c at 2A, but it was a warm summer day with no moving air so If you blow on them they will cool off very much. I wanted to try in the worst conditions and it was prob over 30c in room.
A thing to think about is that they have holes but not tapped for vero29 so you have to get selftapping screws.
Rocket Soul
Well-Known Member
Thanks for the heads up, handson answers, exactly what i needed to know. Will go ahead with these heatsinks
MarCus M.D
Well-Known Member
I have a doubt.
It is possible this setup.
(4) x cxb3070 36v x (1) mw hlg320h-C2100.
Running each at 77.83w x (4) = 311.32w; Vf: 37.06 x (4) = 148.24 vf.
It is possible this setup.
(4) x cxb3070 36v x (1) mw hlg320h-C2100.
Running each at 77.83w x (4) = 311.32w; Vf: 37.06 x (4) = 148.24 vf.
sanjuan
Well-Known Member
Why the doubt? Things look OK to me.I have a doubt.
It is possible this setup.
(4) x cxb3070 36v x (1) mw hlg320h-C2100.
Running each at 77.83w x (4) = 311.32w; Vf: 37.06 x (4) = 148.24 vf.
MarCus M.D
Well-Known Member
Just to be sure my friend.
How would be the best way to connect them? I have read that in series is better than parallel to higher voltage?
MarCus M.D
Well-Known Member
EDIT: my mystake. sorry.
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alesh
Well-Known Member
CXA !=´CXB
(4) x cxb3070 36v x (1) mw hlg320h-C2100 is a good fit.
MarCus M.D
Well-Known Member
I'm realizing now that the Vero 29s are available in a 36.8V configuration (BXRC-40E10K0-L-23) which have a max current of 4.2A. This would add up to fit the aforementioned HLG-320h-c-2100 in a four cob per driver configuration (driver specs: 76-152V output,2100mA.)
The only issue I see with this set up is these chips are listed as outputting 126lm/W; whereas the chip I mentioned prior in the 50V configuration outputs 149lm/W (BXRC-40E10K0-B-73.)
As I stated above the issue I'm finding with this chip is that to power four one would require an HLG-320H-C1400 which puts out a less than nominal drive current for these chips (1.8A for the COB, 1.4A output from the driver.)
Is the concept of running COBS at 50V out of reach due to heat issues? Is the difference between the chips a circumstance of binning and that is why the 50V chip is putting out more lm/w? Would that benefit of more lm/w be negated by having to run it at a less than nominal current?
Sorry if I'm thread jackin, really trying to get this shit situated for my first build.
The only issue I see with this set up is these chips are listed as outputting 126lm/W; whereas the chip I mentioned prior in the 50V configuration outputs 149lm/W (BXRC-40E10K0-B-73.)
As I stated above the issue I'm finding with this chip is that to power four one would require an HLG-320H-C1400 which puts out a less than nominal drive current for these chips (1.8A for the COB, 1.4A output from the driver.)
Is the concept of running COBS at 50V out of reach due to heat issues? Is the difference between the chips a circumstance of binning and that is why the 50V chip is putting out more lm/w? Would that benefit of more lm/w be negated by having to run it at a less than nominal current?
Sorry if I'm thread jackin, really trying to get this shit situated for my first build.
Rocket Soul
Well-Known Member
The main difference is that the 2 chips are different gen, 6 (i think) and 7. If you want a bettet 36ish v cob try to look for the vero finishing with -D-73. B-suffix is 50ish, C-suffix is 70ish and D-suffix is 36ish volts. No point in using the first chip you qouted as its last years version.
Efficiency in gen 7 is more or less in following order: c-b-b, higher volt, more efficient, but main difference would be between gen 6 and 7. 7 is a fine choice for performance vs price. Remember that cob voltage changes depending on drive current, download the datasheet of gen 7 from bridgelux to make aure your setup is kosher. And dont buy the L-23 suffix cob, not only last years version but probably been sitting around for a year in a warehouse.
MarCus M.D
Well-Known Member
Another question around here, if someone would tell me if I can run the following configuration:
(4) CXB3070 BB 3500K x (1) HLG-240H-C1750.
Depending on the temperature, they are between 36.04 (50 °), 35.89 (60 °) to 35.75 (70 °) Vf.
At 50° x (4) = 144.6 Vf and 252.27w.
At 60° x (4) = 143.58 Vf and 251.262w.
At 70° x (4) = 143 Vf and 250.254w.
The Driver hlg240h-c1750 holds 143V and 250.25w.
If the temperature to 1750ma was really 70°, could take the driver to the limit, but it is possible and safe? It would be perfect match.
(4) CXB3070 BB 3500K x (1) HLG-240H-C1750.
Depending on the temperature, they are between 36.04 (50 °), 35.89 (60 °) to 35.75 (70 °) Vf.
At 50° x (4) = 144.6 Vf and 252.27w.
At 60° x (4) = 143.58 Vf and 251.262w.
At 70° x (4) = 143 Vf and 250.254w.
The Driver hlg240h-c1750 holds 143V and 250.25w.
If the temperature to 1750ma was really 70°, could take the driver to the limit, but it is possible and safe? It would be perfect match.
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klx
Well-Known Member
You got it. You just add up the total voltage from all the cobs you want to run in series and see if it will fit within the range of the driver. Your example is great because you max out the driver. The manufacturer would probably say do not load more than 80% but many people max them out with no worries that I know of.Another question around here, if someone would tell me if I can run the following configuration:
(4) CXB3070 BB 3500K x (1) HLG-240H-C1750.
Depending on the temperature, they are between 36.04 (50 °), 35.89 (60 °) to 35.75 (70 °) Vf.
At 50° x (4) = 144.6 Vf and 252.27w.
At 60° x (4) = 143.58 Vf and 251.262w.
At 70° x (4) = 143 Vf and 250.254w.
The Driver hlg240h-c1750 holds 143V and 250.25w.
If the temperature to 1750ma was really 70°, could take the driver to the limit, but it is possible and safe? It would be perfect match.
PilouPilou
Well-Known Member
Hello all!
I have a question about the ideal holder, can you tell me if I'm wrong plz!?
It's written in the datasheet max current 4A: does it mean that I can't run 4 cxb in serie at 1.4A or there is something that I don't understand!? Do I need to add the Amp as if we calculate with voltage?
ps - sry for my approximate english
I have a question about the ideal holder, can you tell me if I'm wrong plz!?
It's written in the datasheet max current 4A: does it mean that I can't run 4 cxb in serie at 1.4A or there is something that I don't understand!? Do I need to add the Amp as if we calculate with voltage?
ps - sry for my approximate english
No the current across the entire circuit will be 1.4A, it is not additive.Hello all!
I have a question about the ideal holder, can you tell me if I'm wrong plz!?
It's written in the datasheet max current 4A: does it mean that I can't run 4 cxb in serie at 1.4A or there is something that I don't understand!? Do I need to add the Amp as if we calculate with voltage?
ps - sry for my approximate english
PilouPilou
Well-Known Member
Thank you very much!
I'd like to run 5-CXB 3590 36 volt using a hlg 240 1400 constant current driver.I may get dimmer option.
Table says 5.1 can be powered but since each cob is below 39volts I think theyll be fine.
Before I order will this power supply power 5 cobs safely or are there better choices now or since last time tables been updated?
Table says 5.1 can be powered but since each cob is below 39volts I think theyll be fine.
Before I order will this power supply power 5 cobs safely or are there better choices now or since last time tables been updated?