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4:27 AM
@NickAlexeev Wiki gives much higher values for white LEDs, so there must have been some progress.
Avago datasheets give luminous efficiency values. The first two companies I checked just gave luminous intensity (so including a factor for the beam divergence). If you click on, for example, HSMC-A100-R20J1's datasheet link, you'll get a datasheet covering multiple colors.
For yellow they give 590 lm/W.
For red, 240 lm/W is the best they have.
Looking around, some of the other families don't list luminous efficacy.
But this one does for a standard T-1-3/4 package. 145 for red, 500 for yellow and 595 lm/W for green. Not a bad improvement for 15 years work.
 
 
3 hours later…
7:44 AM
@NickAlexeev Very, very important to consider the receptor. Human eye or sensor or camera?
 
7:57 AM
@ThePhoton Seems Avago have finally stolen/learned from Osram-OS
Moved away from Avago 5 or 6 years ago, because their datasheets were too much of a hassle to work with
 
 
3 hours later…
10:46 AM
hm, at home I recently slabbed together some smps like dummy load. basically it switches onto some resistors that dissipate the energy and then there is a filter in front of it that makes it look more resistive like. because of inrush etc. I thought about putting more or less the equivalent of a classical dc load in front of it for regulating that out... any other idea?
 

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