I need electrical advice with LED COBs and Drivers!?

[Rocket Pussy Penguin]

Hello! Rocket Pussy Penguin here,
I want to upgrade my grow light to COBs..
Right, I have a ViparSpectra 600w grow light. Inside there is 2x 180V, 670-700mA drivers. The COBs i can source local are 38.5v 2.8A COBs. How many COBs can i wire to each driver, my head is telling me 4?

Is there anyone experienced that can confirm this before i waste my money?

 

[Shugglet]

Hello! Rocket Pussy Penguin here,
I want to upgrade my grow light to COBs..
Right, I have a ViparSpectra 600w grow light. Inside there is 2x 180V, 670-700mA drivers. The COBs i can source local are 38.5v 2.8A COBs. How many COBs can i wire to each driver, my head is telling me 4?

Is there anyone experienced that can confirm this before i waste my money?

4, maybe 5 depending on actual voltage draw of the cobs at 700ma.

Probably 5.

 

[Rocket Pussy Penguin]

4, maybe 5 depending on actual voltage draw of the cobs at 700ma.

Probably 5.

Finally a reply! Thank you, i do have 4 mini fans, so would you say it's safe to go with 4?

 

[Shugglet]

depends on the fans but probably.

 

[Rocket Pussy Penguin]

Cheers dude, massive help!

 

[nfhiggs]

Hello! Rocket Pussy Penguin here,
I want to upgrade my grow light to COBs..
Right, I have a ViparSpectra 600w grow light. Inside there is 2x 180V, 670-700mA drivers. The COBs i can source local are 38.5v 2.8A COBs. How many COBs can i wire to each driver, my head is telling me 4?

Is there anyone experienced that can confirm this before i waste my money?

I would try 5 first, worst case the driver won't be able to get the voltage high enough to push the 700mA through them.

 

[Rocket Pussy Penguin]

I would try 5 first, worst case the driver won't be able to get the voltage high enough to push the 700mA through them.

4 wouldn't blow it though the cobs overall mA will be higher than the drivers? Is that not how it works?

 

[nfhiggs]

Without actually seeing the driver's specs, its sort of flying blind. Does it say constant current on it? 5 of them is 36V on each one at 180V. That *should* be enough voltage to light them, just not sure if it enough for 700mA. BUT, if its a constant voltage driver, 4 COBs is 45V each at 180V, at too much voltage - it will try to pull too much current and the power supply may shut down.