Mars 2 400 Cob conversion: Driver questions

Howdy guys,
converting my two Marshydro 2 400's to cob lights. The initial phase is going to be the growmau5 tutorial on youtube, simply mounting a new COB outfitted plate and connecting the original drivers.

The second conversion will be to remove the stock drivers and replace them either with a single HLG 185hc700 or 2x HLG 80hc700. It costs a bit more but the dimensions of the case seem to favor running dual drivers.

My question is this, I notice the marshydro drivers have the fan's directly wired to the ballast which is driving a section of LED's. The drivers are 55v-100v @ .7-.75A, how are they powering these 12vDC fans@ 300ma?

Basically, the HLG-80hc700 has just enough forward voltage to perfectly fire three cob's & (I thought) power a fan, so that I could run two drivers and be set. But I noticed that meanwell sells a specific driver that is available on cobkits.com to drive these fans as well?

If it is far safer to have an independent driver for the cooling fans of course I would go that direction.

Thanks

I would use the APV to drive the fans separately.

xX_BHMC_Xx said:

I would use the APV to drive the fans separately.

Click to expand...

Agreed, the oe driver probably uses a separate tap on the transformer to power the 12v rectifier bridge.

Cool. I'll go with an APV unit in each light I convert, thanks guys.