I need electrical advice with LED COBs and Drivers!?

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?

Rocket Pussy Penguin said:

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?

Click to expand...

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

Probably 5.

Shugglet said:

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

Probably 5.

Click to expand...

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

depends on the fans but probably.

Cheers dude, massive help!

Rocket Pussy Penguin said:

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?

Click to expand...

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.

nfhiggs said:

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.

Click to expand...

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

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.