want to convert cheap blurple led, need advice.

verticalgrow

verticalgrow

Well-Known Member
Randomblame said:
You need a multimeter to check open circuit voltage and current on the dc output of these drivers. 200-300w at 12v is probably not correct. Can you show me the LEDs on the other side?
I know china COB's are available in 12v at least these full spectrum ones but 5pcs 300w drivers in a 250w light makes no sense. Without knowing the true dc voltage and current of these drivers its almost impossible to make a recommendation for a replacement.
If I know which type of LEDs are used its way easier to assess which voltage is most likely.
But the best thing would be to buy a 5$ multimeter from ebay and check it by yourself.
Click to expand...
:clap:Randombro always busy af helping out here on RIU :clap:

is there any 12V strips around that might fit these drivers perfectly:confused:
 
primobozo

primobozo

Well-Known Member
Randomblame said:
You need a multimeter to check open circuit voltage and current on the dc output of these drivers. 200-300w at 12v is probably not correct. Can you show me the LEDs on the other side?
I know china COB's are available in 12v at least these full spectrum ones but 5pcs 300w drivers in a 250w light makes no sense. Without knowing the true dc voltage and current of these drivers its almost impossible to make a recommendation for a replacement.
If I know which type of LEDs are used its way easier to assess which voltage is most likely.
But the best thing would be to buy a 5$ multimeter from ebay and check it by yourself.
Click to expand...
here is a view of the led's.
 

Attachments

primobozo

primobozo

Well-Known Member
Randomblame said:
Yeah, even with LM561c. Meizu and other chinese alibaba suppliers have them in 12 or 24v constant voltage. Looks like the cheap e3ay 12v strips with a resistor each 3 diodes and cutable.
Click to expand...
Sooo, can I make a better light with this junk? And would it even be worth it?
 
Randomblame

Randomblame

Well-Known Member
primobozo said:
here is a view of the led's.
Click to expand...
primobozo said:
Sooo, can I make a better light with this junk? And would it even be worth it?
Click to expand...

Yeah, its possible!

I see 3 diodes per LED and a current limiting resistor on each LED so its probably really 12v drivers but I would check that additionally because I could be wrong and you still need to know how much current they have. If its 12v you can use Alibaba/Aliexpress 12v flexstrips with Samsung LM561c or LM301b LEDs. I know @VegasWinner has used them but it seems he deleted his account.
Let me see if I can find them, I will let you know.

Solution 1
These are COB's available in 12v and 32v and in 3000, 6000°k and Fullspectrum(1590°k). You need the 12v ones! And please, don't use the 110/220v ones with integrated driver, they flicker like hell and have bad efficiency. I would try it with 2 COBs in parallel on each driver, so you need 10 of them.
You could use 4 coolwhite and 6 fullspectrum chips or simple use 10pcs in 3000°k. Should work but use only one type per driver(2x coolwhite or 2x FS on each driver, not 1CW +1FS, even with the same circuit design the voltage could be slightly different because the thicker phosphor layer means FS COB's run a little warmer and therefor have little less voltage, same like CRI80 and 90).

https://www.ebay.com/itm/1X-50W-white-light-COB-chip-DC12V-32V-Integrated-Smart-IC-Driver-220V-110V-lens/332734653834?_trkparms=aid=222007&algo=SIM.MBE&ao=2&asc=20160323102634&meid=b099b971da0a4c86b9c59f7b7f73452c&pid=100623&rk=2&rkt=6&sd=263729107833&itm=332734653834&_trksid=p2047675.c100623.m-1

BUT, I would still order a cheap multimeter. Somethink like this should be enough.
Max. current of such COB's is 4,2amps and the sweet spot is probably around 2,2,5amps. Your 200-300w drivers are probably only 50 or 60w(5A) so two COB's in parallel would mean they run around the desired 2-2,5A.

https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=multimeter+DT830B&_sacat=0

These are not the best COB's you can get but it's at least the 2nd generation and the 12v ones use 120 diodes. Compared with gen1 thats 2,4 times as much and should make them at least 10-15% more efficient.

Solution 2(~4 times more costly)
Are the 12v flex strips like mentioned above. LM561c is a 200lm/w diode and even with resistors they are much more efficient. Such a 12v COB in coolwhite is probably 120-130lm/w at 2-2,5amps, with LM561c flex strips you can expect at least 150-160lm/w maybe up to 170. You need to order anyway from china..

https://m.alibaba.com/product/50041414537/Original-Samsung-LM561C-LM301B-led-grow.html?subject=Original--Samsung--LM561C--LM301B--led--grow&spm=a2700.7724857.normalList.10.6e581132zdlIlI&detailId=50041414537&redirect=1

You need 3 rolls á 5m (the 120 LED/meter version) and you need to cut them in 30pcs 50cm pieces and connect each 3 strips to one driver (in parallel). A hell of a soldering job but you don't have to worry about the temps. Costs much more than 10 gen2 COB's but would be around 160lm/w.
 
Last edited:
INF Flux

INF Flux

Well-Known Member
Randomblame said:
Yeah, its possible!

I see 3 diodes per LED and a current limiting resistor on each LED so its probably really 12v drivers but I would check that additionally because I could be wrong and you still need to know how much current they have. If its 12v you can use Alibaba/Aliexpress 12v flexstrips with Samsung LM561c or LM301b LEDs. I know @VegasWinner has used them but it seems he deleted his account.
Let me see if I can find them, I will let you know.

Solution 1
These are COB's available in 12v and 32v and in 3000, 6000°k and Fullspectrum(1590°k). You need the 12v ones! And please, don't use the 110/220v ones with integrated driver, they flicker like hell and have bad efficiency. I would try it with 2 COBs in parallel on each driver, so you need 10 of them.
You could use 4 coolwhite and 6 fullspectrum chips or simple use 10pcs in 3000°k. Should work but use only one type per driver(2x coolwhite or 2x FS on each driver, not 1CW +1FS, even with the same circuit design the voltage could be slightly different because the thicker phosphor layer means FS COB's run a little warmer and therefor have little less voltage, same like CRI80 and 90).

https://www.ebay.com/itm/1X-50W-white-light-COB-chip-DC12V-32V-Integrated-Smart-IC-Driver-220V-110V-lens/332734653834?_trkparms=aid=222007&algo=SIM.MBE&ao=2&asc=20160323102634&meid=b099b971da0a4c86b9c59f7b7f73452c&pid=100623&rk=2&rkt=6&sd=263729107833&itm=332734653834&_trksid=p2047675.c100623.m-1

BUT, I would still order a cheap multimeter. Somethink like this should be enough.
Max. current of such COB's is 4,2amps and the sweet spot is probably around 2,2,5amps. Your 200-300w drivers are probably only 50 or 60w(5A) so two COB's in parallel would mean they run around the desired 2-2,5A.

https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=multimeter+DT830B&_sacat=0

These are not the best COB's you can get but it's at least the 2nd generation and the 12v ones use 120 diodes. Compared with gen1 thats 2,4 times as much and should make them at least 10-15% more efficient.

Solution 2(~8 times more costly)
Are the 12v flex strips like mentioned above. LM561c is a 200lm/w diode and even with resistors they are much more efficient. Such a 12v COB in coolwhite is probably 120-130lm/w at 2-2,5amps, with LM561c flex strips you can expect at least 150-160lm/w maybe up to 170. You need to order anyway from china..

https://m.alibaba.com/product/50041414537/Original-Samsung-LM561C-LM301B-led-grow.html?subject=Original--Samsung--LM561C--LM301B--led--grow&spm=a2700.7724857.normalList.10.6e581132zdlIlI&detailId=50041414537&redirect=1

You need 3 rolls á 5m (the 120 LED/meter version) and you need to cut them in 30pcs 50cm pieces and connect each 3 strips to one driver (in parallel). A hell of a soldering job but you don't have to worry about the temps. Costs much more than 10 gen2 COB's but would be around 160lm/w.
Click to expand...
Aaaaaaand, followed.
 
INF Flux

INF Flux

Well-Known Member
verticalgrow said:
Yes if u need a veg light, 12V seems weakass to flower like a HV Cobs thats range from 36-72V
Click to expand...
And here we go with efficiency. There's 8 million documented high watt (good loud amps8-)) grows. Let's see dank grown under the least. lol.
Really though I did 16 2 ft eb's with a mw 120 and its vegging far more than you'd think the driver can handle. in a 8x3. Have a journal going if anyone wants a peep.
 
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