The video you quoted is fine for showing the smoothness and edges of the beam but it doesn’t portray what happens at several meters. The 10511 gets pretty wide and doesn’t show a strong hot spot like it does in this short distance.
The glass covering in a flashlight that protects scratching of the optic or reflector and allows for protection from water and dust ingress is a lens, simple as that. Anyone arguing this is a troll.
Edit: Of course nothing is simple and depending on how technical one wishes to go there are variables, but in ordering a replacement for your flashlight it will be called a lens.
It was a while back, so I can’t be sure. I seem to recall the different amounts of spill light, though.
Maybe someone has some beam shots of just the different lenses to give us an idea of the differences.
I’ll probably keep the frosted lens. My previous lights had clear optics and I never liked the lack of spill light from them. I prefer a reflector type beam pattern and the frosted 10511 seems very similar to that.
Well, they can be called toast if things go awry, but the people that make them call them optics… this is because they are computer designed to align the transmittance of the lights rays, guiding the egress of photons to a predetermined focus… hence, optics through reflective manipulation.
What do you mean? The way I understood it, the driver has eight 7135 regulators in total – there is only limited space available on the PCB so six of those are located at the bottom (spring side) of the double-sided PCB. Where else would you put them?
They don’t actually dissipate all that much power – when all eight are 100% on, I’d assume the driver dissipating around 2.5 W total (worst case) when the battery is at 4.2 V.
What is probably meant is that the 7135 chips are orientated 90 degrees different from usual, what makes the thermal pads not facing the ground ring anymore and thus the heat has a worse path to the flashlight body.
Those 7135 chips are pretty tough though and I expect that they can handle this.