sounds like a hookup?cxb kits (3000,3500,4000k) are shipped, should arrive at the sphere next week.........then it's wait time till it's in cue for the volunteer work.
i was going to assemble some of these and send them. its not the ideal heatsink (what is) butThe only problem I see with this, is that every COB/heat sink comb should give different results. Am I wrong? I will look around locally, because I would like to test the CLU058s at various currents on an oversized heat sink. If you find someplace in NorCal for cheap, I'm in.
That sounds perfect if they provide power. I've only read reports of full fixtures, where the driver was also being tested.i actually spoke with a company yesterday and best bet is to use their precision power supplies. so yes the most isothermal heatsink we can come up with if we wish to eliminate thermal droop.
i think i might bite the bullet and test some light engines
Light output, that's about it. Photons per second, it's what plants crave. We can trust manufacturers on spectrum data, for instance. I compared @Malocan 's spectrometer data against what Citizen provided, and they were practically identical.I have looked at a couple websites on testing and there is a bunch of different types available. In order of importance, what tests would be most useful?
hookups are over, I can't beg for more tests.............time to break out the $$$$$$$$$$$$$can you post links to any other sites you come across, ive already reached out to the two in this thread
sounds like a hookup?
Well nice, but data sheets already have all this info. The test should also include actual Tc for each measurement.ok first lab that got back to me wanted $540 per test (and if you test 3 currents thats $540 x3 - ouch!
they said they can do raw data and measure input power, lumens and also provide this spectral data for $315:
View attachment 3785658
seems like we could either digitize the curve or sum the data from 400-700 to get what we need.
a barebones lumen measurement with no spectra is only $270 but is less useful for us par-hounds, unless i did the spectrum measurements myself and then we used that to convert lumens to ppf. not sure how varied actual spectograms are from the datasheets
We're not talking $5k for a sphere big enough.Pardon my ignorance, but what are $5k for a grower? 1lb of quality pot - 2 plants in 5 gal buckets? I thought there are a lot of growers around here.... If it is really $5k to buy a sphere, there's gotta be someone or a few that are able to put it together. Gofundme might be a pretty good idea.
Just from mathematical point of view, getting a single result at a specific current won't cut it. There will have to be a lot more tests and recordings in order to establish a pattern so then a formula can be created that will give the desired output at different currents, temps, kelvins. This will be a huge amount of work to get the real data for so many chips out there....
250k'ish for a 3mWe're not talking $5k for a sphere big enough.
Not a good fit for YOU maybe..............but for final production units it's a great serviceupon further review i dont think light labs are really a good fit
we dont need a one-time measurement of a fixture for marketing or compliance purposes
we need an assload of measurements of many models of chips under different current and thermal conditions.
im looking at buying a sphere instead. at $300-$500 for basic measurements, $3-$5K for a setup is not ridiculous
even this 6" one would do it
http://www.stellarnet.us/spectrometers/integrating-spheres-and-tubes/?gclid=CPeIm6qutc8CFRSUfgodJi8E2A
they want to sell me a spectrometer but i already have an ocean optics fiber optic i jsut need to adapt it, so i may be under $2k here if i can make that 6" sphere work for raw chip testing
But you do build and sell almost complete single cob fixtures(minus driver)...........lolwell yeah, i dont build fixtures.. but if i did i sure would spend $500 to fully characterize it in an accredited lab
my gig is rooting out the best chip values and then offering them up... so yeah it fits me.... and most of the DIYers as well.