RippedTorn said:

In my mind we need to know what impedance these drivers can operate at. Just like audio. Higher impedance = less power, too lower and you'll blow shit up.

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MIGrampaUSA said:

I'm not sure exactly what you're asking ... impedance isn't a term usually associated with an LED driver. Meanwell drivers are very high efficiency (95% and higher efficiency ratings).

The closest I can think of to what you're asking is "resistance." LED's don't have much resistance, and without a controlled current, they will overheat and melt the solder inside the LED causing it to burn out, not combust. There are 2 ways to prevent that. 1: a resistor built into the LED circuit. 2: Use a constant current driver - the original poster is using a constant current driver. His driver won't drive those 2 boards at max. He's got the right driver for 2 boards, thinking it would drive 4. It will energize 4, but won't drive them at a high ppfd due to the driver limitations.

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MIGrampaUSA said:

I'm not sure exactly what you're asking ... impedance isn't a term usually associated with an LED driver. Meanwell drivers are very high efficiency (95% and higher efficiency ratings).

The closest I can think of to what you're asking is "resistance." LED's don't have much resistance, and without a controlled current, they will overheat and melt the solder inside the LED causing it to burn out, not combust. There are 2 ways to prevent that. 1: a resistor built into the LED circuit. 2: Use a constant current driver - the original poster is using a constant current driver. His driver won't drive those 2 boards at max. He's got the right driver for 2 boards, thinking it would drive 4. It will energize 4, but won't drive them at a high ppfd due to the driver limitations.

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Stoobeey said:

Thanks again driver flip out was fast as hell , great growth now that everyone is catching back up (just wondering how detrimental that lack of light was to the 2 autos and how big they'll get now)
I was actually able to return the 120 driver to digikey too so win win all around.View attachment 1091286

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Stoobeey said:

Thanks again driver flip out was fast as hell , great growth now that everyone is catching back up (just wondering how detrimental that lack of light was to the 2 autos and how big they'll get now)
I was actually able to return the 120 driver to digikey too so win win all around.View attachment 1091286

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MIGrampaUSA said:

I'm glad I could help you sort it out.

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