That makes sense. The emitter of the SST-20 is smaller than the XP-L emitter => more throw
Also, the SST-20 costs around 0,60€ in quantities of 1000 while an XP-L Hi is around 2,50€ in quantities of 1000.
That alone is a difference in material costs. But please don’t ask me why the difference is 4,50€ per emitter.
I recall some of the more knowledgeable folks hereabouts mentioning mixing several different LEDs to get better color rendering.
If y’all can specify a good combination of emitters, would it be interesting to ask for that configuration?
I’m not that Hank, I’m the other one.
I’d especially like to see what the 5000K one looks like. I’ve been wondering about SST20 5000K for a while.
People may take it for granted that Emisar lights come with good emitter choices, but compared to almost every other brand, it’s really special and unusual. Take Olight for example… almost everything is cool white, and one of their recent lights only comes in 7500K. It’s kind of amazing that Emisar has so many choices.
Vinh’s lux meter seems to use a different scale than most people use. The correction factor seems to be about 0.75 or so, if you want to compare the numbers against other people’s. For example, the D1S (stock with no mods) is listed as 130 kcd on Intl-Outdoor or 170 kcd in Vinh’s shop. 0.76 correction factor. Every other light I’ve checked (or measured) also follows a similar pattern with a factor pretty close to that.
With the vaporizer crowd and power tool manufacturers flocking to the 21700 format, I do find myself wishing that a 21700 battery tube were available since that formfactor may yet see some improvements on its already-impressive power/density characteristics.
I had a similar issue and thought it was a driver or firmware or mechanical issue. Turned out to be a simple mechanical issued alright - the tube:head connection wasn’t as snug as it could be. Tightened it up and the issue disappeared.
Recently I collected all measurements that I could find for a number of lights:
In some cases there are Vinh’s numbers.
In 1 case the number is indeed an outlier, in others its not.
GT Mini: Vn 170 kcd, others average 128.5 kcd
Cat V6: Vn 175 kcd, others average 178 kcd
T27: Vn 335 kcd, 1 other 340 kcd
Do you think it would be sensible to mix SST-20 3000K 95CRI and SST-20 4000K 95CRI on the D4S to gain a beam profile with 3.500K color temperature? Would this even work as the 3000K version is probably subject to become warmer and less efficient in conjunction with the 4000K SST-20 at full brightness level? (...thinkin' about Vf, thermal specs, maximum current, etc.).
Whew to my eyes that is one green beam; doesn’t matter if it throws a mile, no ty.
On a good note I ordered a 3000k SST20. Super excited about that. I.already have 2 D4S, a Nichia and XPL-HI 5000k. I hope the SST20 is as nice as djozz found with his testing! Should be amazing in this quad! Thanks again Hank!
@Lux Perpetual, since the VF usually changes significantly when going with different emitters or higher CRI emitters, going with 2x 3000K and 2x 4000K SST-20s will be about perfect in terms of tint mixing compatibility.