White LED lumen testing

[blasterman]

Sidebar, but Chauvet's Q-spot 260 moving head is powered by a CST-90.

Haven't seen one in action, but reviews put it in the same ballpark as 150watt discharge.

In a compact plastic fixture we can se how jtr1962's tests are so critical.

[wquiles]

Besides the SST-50 and Nichia NS6L183, I'll be testing some neutral XP-Gs I purchased this month. Enough testing I'd say to fill the better part of a day.

Which bin of the NS6L183 will you be testing? I used one in this build and I like it a lot.

Will

[StupidPig]

Information here is very valuable, thanks.

jtr1962, could you mind to explain a bit on how you convert the lux reading to lumen? I looked into your spreadsheet and it seems very complicated and I'm not quite understand. Thanks.

[zzonbi]

Remember 1lux=1lm/m2
So you basically add the lumens back, integrate. Now the finer you go dividing an area, the better. I guess jtr also uses symmetry in led patterns to cut down on sampling.

[Vbeez]

Subscribing this. Very valuable info.
Thanks

[MikeAusC]

. . . . . . For example, look at this chart for the XP-G:



The red line represents total input power to the LED and the white line represents waste heat. . . . . .

I know this was posted TWO YEARS AGO, but I'm wondering how you determined WASTE HEAT to produce this graph. It's hard to find verifiable information on waste heat from LEDs.