Problem solved! Lol. Well turns out I was trying to wire two 288's and two 304's together in series! I guess I didn't realize I had different boards... But got the 304's on an hlg 480h c2100a in parallel. And have an hlg 240h c2100a coming for the 288's. Felt pretty dumb when I finally saw what I ha...

I haven't tried 3 in series but I will.
So to test the voltage I use a multimeter and with the lights on I put the leads on + and - of each board?
I'll also double check the polarity of all the boards.

Hey all long time no post. But back to playing with LED. So I bought my dad 2 HLG. QB288 slate 2 doubles. That's 4 QB288 on 2 heat sinks. I got an hlg 480h-c2100a to drive em in series. So got em hooked up in series like LEDG video says. But when plugged em in they came on real dim. I tried to adjus...

What up fellow LED lovers! I heard bout this forum from led gardner show on the tubes!