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one of the better designs ive seen. if you could get the cost down with some volume i think it could have some legs. since youve got access to the machining, putting tapped holes for 35mm holders every 6" or so would be a bonus

so the extrusion is a square profile with a round center? is there enough meat in the extrustion to screw on cobs without tapping into the water filled section? if the entire length is that size thats a fairly heavy water bar keep in mind that discrete cob-sized cpu waterblocks are less than...

i reread the page with the "rankings" i would literally disregard EVERYTHING there so much bullshit and so many inaccuracies and misrepresentations i dont know where to start one thing i will bet you- whoever wrote that "Article" is one company that sells every single garbage light they...

no its only purpose is to make sure resistance is AT LEAST 100K where pots can be +/- 10%. so if you have a pot thats really 90K it becomes 100K when you add the resistor and if your pot is 110K making it 120K doesnt hurt anything it just changes the range of your dimming very slightly hardly...

cobs just came first so there are more of them out there QBs or cobs using luminus, vero, citizen, or cree are your best option the only decent light out of the ones you listed was the cxb3590 one but even that they were driving the chip twice as hard as most people do which will hurt...

drilling and tapping aluminum is cake assuming you have a drill press if not you can get one for $49 from harbor freight use the right size drill bit and a spiral flute tap and plenty of cutting fluid (wd40 works well for aluminum

keep in mind at 10% load many meanwells are dipping way down in efficiency so determining power output from power input is not so simple

you can do the math with the info above using samsung simulator knowing 16s18p

well with no salt buildup in media im sure its fine

on what scale? (in other words what EC?)

not easily. 2540s are small cobs and not industry standard size. and youre paying good money for cobs you wont use out of the box

those are also somewhat dated and not the usual first choice due to cost depends what youre growing. there are literally threads upon threads about it most people opt for 3000-3500k and 80 or 90 CRI for general use

lumens is meaningless with a predominantly blurple spectrum. looking at the test reports, for "XL120" PPF= 1480 umol/s power = 1164 W 1.27 umol/J theyre probably beating the hell out of cheap inefficient diodes, thats the kind of numbers crappy led mfrs were putting out in 2014

sales @ cobkits its in my signature

email is 1000x better

not necessarily as driver tops out at 48V, but without actually having an actual voltage and current curve for the boards its hard to tell

which in and of itself is... reflection for our purposes also glass mirrors are quite a bit easier to clean than mylar

im going with higgs on this one. youd have to look pretty hard to find a mirror with less than 80% reflectance with even the worst glass and crappiest coating

hlg185h-48A will give you 2.1A per chip on those https://cobkits.com/product/meanwell-hlg-185h-48a-driver/ hlg240h-54B will give you about 2.25-2.3A https://cobkits.com/product/meanwell-hlg-240h-54b-driver/

40-60% is more like a sheet of white paper mirrors are right up there with (new) mylar