Re: Manker U22vn - ;-)
I do not believe a max driven XHP35 HI has more luminance than a max driven sliced dome SST-40. If it had more output and more luminance there'd be no reason to use SST-40 sliced dome.
In Koef3 tests,
XHP35 HI E2 is just 4.8% less intense than
dedomed SST-40 while giving 34.7% more light.
It is more efficient in terms of lm/W, but less efficient when considering cd/W.
But Koef3 cooling setup is way better than what we see in flashlights and XHP35 will suffer from that more than SST-40.
Add to that driver availability problems (to be solved for many hosts soon!), cost difference (especially driver cost) and I'm far from saying that dedomed SST-40 is obsolete.
What I said was that I expect XHP35 HI with the right driver to perform better than
domed SST-40 in both cd and lm. And cd/W and lm/W as well. Because of cost - I still don't call the SD variant obsolete either. Though I'm not sure really.
C8 head diameter is 45m
MK35 head diameter is 86mm
Depth is relative to head diameter so we cant compare depth of a light that has nearly twice the diameter.
I compared width to depth ratio, not values directly. Well, actually I compared diameters of both openings. If one reflector has a 50% larger diameter than the other, but only 30% larger LED opening it must be deeper. And I can do a rough comparison without opening lights.