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does not work...

I know too much, to run a fixed spectrum point source...damn science

"Rated lumen-maintenance life is measured in hours with associated percentage of light output, noted as Lp. In other words, L70 of 30,000 hours means that the tested LEDs produce 70% of the initial light output at 30,000 hours."...

Shit happens...... sometimes...

living on the edge with two cobs in the 36V class.... and sometimes you loose

around 40% better then what Cree recommends at 1400mA and 25°C...Mr COB-Killah

Typically you are a smart guy, but sometimes ... ...look at the datasheet and it can be higher for 700mA

Just for Fun.. this is what the use in an integrating sphere. real numbers on left table distributed as Paint, film or foil

the word is range not step! "Does MW LED power supply allow adjustment of output voltage and current levels? Ans: LED power supply comparison table to see which MW LED power supply allows for V/I adjustments. A suitable unit can be picked based on the type of adjustment required. For the...

beam-angle and distance are the main factors for PPFD calculation. and you are not the guy that will break this law of physics same shit here https://www.rollitup.org/t/top-bin-cob-comparison.891010/page-29#post-12268518

this is a standard method. from philips-lumileds Measuring Rth J-C The junction-to-case thermal resistance, Rth J-C, is a measure of how well heat can be dissipated from the die to the package case from which heat is extracted by placing it in thermal contact with an external heat sink. For...

it was not directed to you, think more general the IR-Sensor will see only the outer peripherie of an Heatsink which is also the coolest part. this temperature also depends on the ambient temperature thats surround the heatsink. size and style of the Heatsink will also change your readings. A...

and the next thing is what will the IR-Sensor see here is a closed look at the temperature gradient for a active cooled Heatsink

half amount of UVB for indoor lighting as we have no Infrared in our lights BTW some UVA (3 - 5%) at 365nm will have the same effect and it´s safer for your eyes and body

grey market... copy-catz take a deep lock at this portfolio from http://www.latticebright.com/En/cpzs/cpzs1.html cree or not? these are the single diodes copies from cree...still waiting for the perfekt cob-copy

ok offtopic your pickup,the lenght of your Cable and the input Impedance of your Amp builds a high cut filter. shorter cables gives more high tones. way cheaper then this overpriced cables. and just ready, my little practice Cab celestion Frontsize 65 x 40 cm 25 cm deep. 4 / 16 ohm switch.-...

PPFD is a spot measurement, the average has to be calculated. the basic calculation can be found here > http://www.dfisica.ubi.pt/~hgil/fotometria/HandBook/ch06.html

simple mat random numbers or higher math?

what´s that?