Thank you very much for that info. If i used an E Bin emitter what do you think OTF lumens would be on average, not the first second.(thats like a camera flash and doesnt count IMHO).
If I'm not mistaken, a WN bin is currently the highest available bin. A WE bin would be taking a huge step backwards. Were you reading the SSC P7 flux bin chart? Unfortunately, each manufacturer has a different way of labeling their emitters, so once you figure out the charts for one manufacturer, you have to start all over with the next manufacturer:hairpull:
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I think the reason lumens fall so fast in my light is due to the voltage forward of my emitter, the 7135 based driver for a high current application combined with a high vf emitter and 1x26650 not being able to deliver because of resistance and possibly voltage sag. So, if you use a WN bin emitter, that happens to have a low vf, and you're able to drive it at 6A (@ emitter) without voltage sag; and you have good heatsinking, then let's see what kind of numbers you could get.
By looking at the binning chart on the datasheet, at the manufacturer's website, we know a WN bin SST-90 has a minimum flux (lumens) of 1000 @ 3.15A and a maximum flux of 1200 @ 3.15A. Then, by looking at the luminous flux vs current forward chart, we can calculate roughly the EMITTER lumen output for a given drive current. For example, using the previously mentioned emitter, driven at 6A, the output should be roughly 180% of the original 3.15A number, so the minimum would be 1000 x 1.8 (180%) = 1800 calculated emitter lumens. The max would be 1200 x 1.8 = 2160.
Now, let's say you only have 20% worth of OTF losses. 1800 x .2 (20%) = 360, 1800 - 360 = 1440 CALCULATED OTF lumens minimum. Max would be 2160 x. 2 = 432, 2160 - 432 = 1728 calculated OTF lumens. Maybe this will help you.
Casey