power supply fail.
got one of these to see how far i could push a 3618 and it wasnt up to the task
http://www.ebay.com/itm/182292429613
with no current regulation and limited voltage regulation i couldn't get it to deliver less than 4.3A to a single cob (out of spec), and it couldnt light up two in parallel. i guess well have to wait for that HLG-480 for that
so now i have 2 3618s humming happily on a 320h-1400b in series instead at 205.3V x 1.42A = 291W. seems like theyd run forever at this load. despite the case temps calculated, the active heatsinks are cool to the touch
View attachment 3804550
so i guess that will be my tent PAR test when i set up an extra 3x3- 1 3618 on a 320-2800 vs 2 on a 320-1400