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also i remember my first grow 25+ years ago quality was fantastic as it was one plant under a 150W HPS and i watched her obsessively its really difficult for even an expert to scale something 10X with the same success yet alone a noob trying to stuff that kind of yield in a 5x5

i dont think 1.33 gpw is as much of a stretch as 55-75 g/SF not impossible but youd be a helluva noob

growing a pound is no measure of the lights efficiency or durability i could grow a pound with 10000 birthday candles if i wanted to

mostly diode tech the efficient monos they use in todays fixtures simply didnt exist back then

i never mentioned output, only efficiency, they are both 2.2-2.3 umol/J clw is 439 ppf output not 350 i also never mentioned price. if you want an out of the box experience with the QB its $350, but they are not apples to apples in any case, they are entirely different classes of lights.the...

that CLW in your report is not the same one hes looking at which is 2.23 umol/J at system level. if you want to dupe that with a QB shoot for just over 2.5 umol/J at board level

they are an honest company.

CLW 275 is the only decent light of the ones you mentioned

shoot for 1/8" thick min heatsink even at low power on cobs

high bays, stadium lighting, street lighting, mall/store/restaurant spot lighting etc

i wouldnt say comeback... they are really the same tech and for DIYers are currently both very similar in terms of cost per watt at a given efficiency almost every breakthrough (yield, die efficacy, durability, phosphor, thermal dissipation) benefits both techs what is the flavor of the month...

i just got samples of the new high-current citis in 1212, 1818, and 1825 if the datasheets/simulators are correct the high current 1212s are almost as efficient as the gen6 1818s at a given wattage (which will put them right there with the luminus cxm22 gen3). if they can keep the pricing on...

:: pours one out ::

so youre saying this product which is just hitting the market is "#1" based on some "special technique" that nobody knows about. the floor is yours so have at it

they dont make that claim, fwiw

i put 9 cobs on a frame in a 3x3 tent and its stuffed with uniform light. and the heatsinks dont barely even get warm at 25-30W/cob

a great example of how money is way better spent on emitters than thermal management take the 4 best cobs you can and run then at 200W each youre in about $200 on chips and $400 on heatsink flip that and spend $400 on chips and $200 (or less) on heatsinks and you have double the number of...

the giga is about a $400 heatsink once you buy the holders etc

by definition more data points is going to give you a more accurate number if you felt like crunching numbers you could average those cells above into blocks of 4 or 9 and you'd see that the uniformity probably goes up in any case, if uniformity is your measure, number of datapoints is kind of...

you can do that in excel make the cells square use conditional formatting "if value is between 600 and 700, make cell this color, if between 700 and 800 make it that color", etc. looks like they went a little more detailed than that but once you set it up you can save it and use it again and...