QB304 Driver selection no help from hlg!

[AquaNuggs]

My question is I have six qb304 boards with heat sinks. But I want to run them in 3 separate series of 2. For Mobility. Hlg website recommends 240 h C 1050. But I want to run my boards between 125 and 135 watts each. Any help would be deeply appreciated my plants are waiting for the improved light source. Thank you in advance!

[Shimbob]

How about a HLG-320H-C2800, and dim it down to 2.4A? Two QB304 in parallel, ~110V at 1.23A each

[AquaNuggs]

I'm concerned with thermal Runaway wiring it in parallel This is my first build so I'd like to keep it as simple as possible. But thanks for the idea

[Shimbob]

-C1400 then.

A lot of people wire in parallel, but thermal runaway doesn't seem to occur often, or, at all as far as I can tell.

[carpet1der]

I am running something veeeery similar to what you have and was worried about wiring in parallel. I have 3 QB288 V2 boards on one heat sink and another three the same way all wired in parallel using a 5 port wagos to help with the worry of thermal runaway. I also will put some fuses on it later but had to get the lights up and running before things got weird. So far all is good!

Go parallel without a worry.

[carpet1der]

PS: That was and is my FIRST build. Took 20mins

[AquaNuggs]

Thank you so much for all your input now I have to find out what size screws to use to mount my Quantum boards to the heat sinks. Hlg apparently forgot to put them in the box with the 6 kits I ordered. If I want to get them done in a timely fashion I'm going to have to buy a box of 50 screws. If anyone knows what size screws these are I'd appreciate some insight.

[carpet1der]

M3 Screws


HLG says:

1x Slate 2 Predrilled 340mm Heatsink
M3 Screws to mount board included

[AquaNuggs]

Thank you! I was lucky enough to find them at Ace Hardware. The only ones to have them locally