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8" yesterday, foot today

there was a thread about these exact same lights last week https://www.rollitup.org/t/new-newie-got-1800w-cob-leds-needs-advice.959449/

return them if you can.

depends on the number (and type of) of cobs and boards you use. they are the same phosphor white tech and either can achieve same efficiency levels when run soft

does your vero18 have the two notches like in this drawing? they should work with the 35mm spacing on the 133mm heatsinks for clu048

id have to look at the drilling for vero 18, not sure if i have compatible heatsinks fo rthose. i think tehy are 35mm spacing but could be wrong 60W is fine for passive heatsinks

heat produced for xx watts between cobs and strips and boards is all within a few percent.

not right now. special pricing on large orders so email me if thats the case

if anyone is thinking of putting an order in, were supposed to get a foot of snow or more this evening so if you get it in within the next few hours and i can ship today, otherwise might be friday

clu1825 are good cobs if you are handy and dont need the slick pretty packaging you could build that same setup for about $400 with parts from my store

it will be fine. while there are better options for cob models right now, all cobs are more similar to each other than they are to other techs. quality of light is the same, but its just a notch down from the current standards of efficiency just dont buy any more, check back here to see whats...

i have to agree. his profit margin is prob so obscene on those garbage lights that hed rather sell 3 or 4 or 5 for $1300 than give back the $1300. and anybody who would recommend 80 lm/W CFLs in 2018 knows absolutely nothing about lighting and surely shouldnt be relied upon for advice. not...

lol at 35 minutes when he thinks the competition is reverse engineering his spectrum he still doesnt present an actual PPF for any of his fixtures calls corners of a 4x4 where PAR is 250 usable grow area vid is almost at the level of where he was astonishing himself with "oohmoles" from his...

54B would be a safer driver as it would limit the voltage to 54V in case only one cob was connected i dont understand this translation (though it sounds beautiful!)

2x4 = 8 square feet 8 square feet x 35 W/SF = 280W of stuff i have on hand several drivers can get you there 2 x hlg185-36A (youd be using 75% capacity on each driver) 2 x hlg185-c1400b (again dimmed to 75% capacity, with room to turn up) 2 x hlg185-c1050b (using about 80% of driver with roo on...

unrelated but thread title reminds me of

there was a post awhile back that showed measurable reduction of umol/J when HIDs are dimmed. i want to say 5-15% or so

you def got it, just worth emphasing for noobs that just because lumen number goes down doesnt mean the new color created is outside of the PAR range we want, and in most cases its in a more usable red or blue wavelength

smaller HIDs are less efficient, as is dimming HIDs

i always thought that but never really worried about it. but yeah youre right i prob got confused from some flir shots of bulbs themselves from underneath