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grow led diy

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Zero999:

--- Quote from: Irukandji on March 04, 2019, 03:12:00 pm ---Thank for your help!

If u look on the video above he set all of his Leds in one row. There are blues and also Red LED's in and i'm sure they use different voltages as u said. I also checked the data sheet of the LEDs and u right about the specification.

So how he can manage all his LED in only one row?
--- End quote ---
It's not convenient for me to watch the video at the moment, so I can't comment on it.


--- Quote ---Also i only need 700mA Driver for 700mA led's? I rad about a prozentage about 10%-20% above the max of 700mA. So the Driver should have around 800mA? I'm right?
(Sorry for asking again but im confused about it)
--- End quote ---
No, if anything, to prolong the life of the LEDs, driver should be rated for slightly less than their maximum current rating.

The best way is to use one constant current driver with all of the LEDs connected in series and no resistors. The maximum output voltage of the LED driver should be greater than the sum of the LED forward voltages.

Irukandji:
@ Zero
thanks again i think i got it now. So the mA can be the same as used (700mA Driver for 700mA LED) but the volateg should be above the sum of the LED's in a row (2xLED(3,2V) = 6,4, the driver should have 8V).


Who ever added the comment about the mol per day thx for that!!!
If you dont want to post here pls mail me private :D

Irukandji:
Hi there i have one more question.

I have choosen two different LED manufactorer.
The First one are the chinese no Name LED with 3W and the seconds are from Osram a well know manufactorer.

3W Deep Red 660nm 2.4-2.6v 700mA 60-70lm
3w royal blue 440-445nm 3.2-3.6v 700mA 30-40lm

(I cant find any lumen specification or how to calculate the mole)
High Power LED OSRAM OSLON® SSL 80 660nm hyper 3W
High Power LED OSRAM OSLON® SSL 80 451 nm deep blue 3W

Who of them are better? I know its a stupid question but maybe someone tested both of them.

daniel444:
i have built a grow light using 4 of these in series
https://www.digikey.com.au/product-detail/en/bridgelux/BXRC-40G10K0-B-73-SE/976-1581-ND/6557083
mounted on a heatsink i got from a large solar inverter scrap
they use poke in wire connector , i prefer the solder connector but these are cheaper
they have 90cri and people are successfully using them in grows , more pleasant to the eye

i recommend you put 2 of them in series on a large heatsink  , the heatsink is the hardest part to find , try to get a large used one
for the driver something like this
https://www.digikey.com.au/product-detail/en/mean-well-usa-inc/ELG-100-C700/1866-1472-ND/7702924

Zero999:

--- Quote from: Irukandji on March 06, 2019, 01:11:06 am ---Hi there i have one more question.

I have choosen two different LED manufactorer.
The First one are the chinese no Name LED with 3W and the seconds are from Osram a well know manufactorer.

3W Deep Red 660nm 2.4-2.6v 700mA 60-70lm
3w royal blue 440-445nm 3.2-3.6v 700mA 30-40lm

(I cant find any lumen specification or how to calculate the mole)
High Power LED OSRAM OSLON® SSL 80 660nm hyper 3W
High Power LED OSRAM OSLON® SSL 80 451 nm deep blue 3W

Who of them are better? I know its a stupid question but maybe someone tested both of them.


--- End quote ---
The trouble is you've not provided part numbers. The lumen output for the no name LEDs might be a bit optimistic.

I Googled for OSRAM  OSLON SSL 80 and found the following relevant links. The test current is 350mA, but they're specified up to 1A, although I wouldn't recommend running them at such a high current continuously.
https://www.osram.com/apps/product_selector/#!/?query=*&sortField=&sortOrder=&start=0&filters=productbrand,OSLON,SSL,80&filters=productbrand,OSLON,SSL&filters=productbrand,OSLON&deeplink=

https://www.digikey.com/catalog/en/partgroup/oslon-ssl-80-leds/53317

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