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It's not a question of what the given plant is receiving but what and how much the given light source is dissipating, i.e. light.

Lol it is YOU who are being dumb, as you have repeatedly refused to LISTEN to and ACCEPT the SOLUTION to the PAR meter's wavelength imperfection. I don't know how else to spell it out for you - can someone help this poor individual with basic comprehension, please??

I prefer and recommend using WD40 for these applications, as most cans of WD40 come with a little tube that works really well for the size of holes we drill/tap for.

When you mention quality, you're referring to various wavelengths correct? That seems to be the only argument against PAR meters, regardless of the fact that most of us have correction factors for those missing wavelengths. If there's something you or someone else knows about those corrections...

I'm curious as to how you managed to fit even a 26AWG wire through the already tight crevice between a Vero and the clamp that attaches to the ledil reflector. Not saying it can't be done but I looked at my leftover clamps, presumably the same series of clamps you are using, and mounted them to...

Yeah I noticed that too, that while the Vero Tc reading point is within mm's of the LES, the CXB's is closer to the corner of it's board. They even used different materials for their reading points, with the latter providing a small yet metallic surface.

Nah used my handy dandy PAR meter from Apogee. What would you guess the difference in results would be if one were to take, say, two samples and test with both approaches, those approaches being the use of a PAR meter, which is what most growers and grow light manufactures utilize to get an idea...

I was hoping he was using something a little more optimal, such as a K type thermometer. Abiqua had a link to a nice, affordable one in one of the other threads, something Bridgelux or Cree may rather approve of ;)

What sort of device are you using to measure case temperatures? Again, I've only worked with Cree cobs from a single source and the test results were shocking as the proposed efficiency bump from Vero 29 to CXB3590 CD wasn't as big as what some would have guessed. I'll possibly know more as the...

Well this data closely matches and reinforces the data that Robincnn established a few pages back. Great work, Supra. :clap:

4000~5000K is typically a great choice of temperature for seedling/vegging. You won't need as much light in veg as you would in flower and will only need to cover portions of the room where plant life will be present. If you go without optics, you can have some distance (x-axis) between lights...

@robincnn The CXB3590 CD 3500K most definitely looks more red than the Vero 29 V2 3000K under the same optics and at the same current. Did you have a similar finding? @SupraSPL I'll be testing case temperatures for the Vero 29 3000K & 4000K and Cree CXB3590 3500K CD later in the week with...

@hillbill That's my go-to show on Netflix. The scripts for that show are legendary. @REALSTYLES It's good that you're growing something with those cob units but the size of those plants, really? I remember growing plants twice as bulky with Lighthouse's early version LED units (Blackstar...

Third party manufacturing is what the cool kids go with. It won't be long before you make the transition over to the dark side, lol.

@Rahz Yes a bit of a surprising result and this was also the case for my results at 1.6A, which led me to question the provided numbers and figures that Cree provides, as well as the authenticity of the binning. More data from multiple sources would be ideal in attempting to better understand...

It makes for an interesting choice between using various colors when considering umol/j and efficiency, although most overall photon counts have come close to one another between the 3000~4000K flavors of, say the Vero make, which leaves the quantity of given wavelengths the remaining factor in...

Avoiding the ambiquities of comparing various lighting sources when using the mentioned measuring device and with all factors being set nearly the same, e.g. optics used, height difference, current in, Vero 29 and CXB3070/3590 cobs have performed similarly for me throughtout my output tests over...

@Rahz Perhaps SupraSPL will if he hasn't already? I really have no personal interest in running these kind of cobs any lower than 1.6A, as any lower becomes cost prohibitive for most folks. @Greengenes707 Perhaps you're right about me not understanding anything at all and not knowing what I'm...

@Greengenes707 Idk why your emote is repeatedly racking his head against a wall in response to this subject - you have a PAR measurement graph on your product page, with data used by the same instrument/technology. Why don't you come out of your safe space and explain yourself, mister.

@BuddyColas Whether they're ran at 1.6A or 2.86A, the Vero 29 and the upper CXB lineup perform very similarly in terms of output. Cree supposedly runs more efficient at lower currents but ultimately you're paying that extra premium for the heat reduction/increased efficiency and name of...