An effort towards a repeatable test method for UV-leds. New tested: 3535 365nm Liteon led, 5050 (XM-size) 2.8A Epileds 400nm led

[djozz]

@doubleone44

Sorry for the necro, but I like this technique.
Noteworthy, at the intensity of these LEDs, the double excitation of electrons is rare enough that it shouldn’t have a significant influence over thermal sag etc.
The only improvent I might make is using a remote phosphor layer instead of a sheet of paper as those are way less variant in amount of fluorophore and are resistant to bleaching (at these intensities)
All in a good read!

Thanks for liking the technique, and it is quite a coincidence that I just two days ago posted an upgrade of the method, I use a piece of uranium glass now instead of the paper. But a sheet of remote phosfor may also work well indeed.

Updated my UV-led test method (=final), tested a Luminus SST-10 365nm led (and some others)

[image] Introduction of an updated method of testing UV-leds. I make a point of posting my test methods very thoroughly because the equipment that I use never looks like a slick designed box that makes you automatically trust in what it is doing, but it usually is a messy combination of loose (but well-chosen) components, carefully bought, found in the kitchen drawer or scavenged from other equipment. That does not imply that it works less well than expensive manufactured equipment, it may wor…