Yeah… the D4S’s blue light isn’t going to give anyone cancer.
Light, in general, tends to make people feel more awake. Particularly blue shades, but blue is also a component of white. The D4S’s 4000+ lumens of white light (of which probably 1000 is blue) are going to have a much bigger effect than half a lumen of glowy blue from the aux LEDs. Or on the low mode, it’s like 0.001 lumens. It’s completely negligible. The brightness is more important than the color. Even a 2700K incandescent bulb emits more blue light than these little aux LEDs.
Most people have at least some wakefulness response to light, but not all. Out of every 20,000 people, about 3 don’t have this response. Of those 3, statistically, 2 are actually blind. And I’m the other one. Because I see just fine, but my iPRGCs don’t work.
If you want a D4S to cause cancer, you’ll have to eat the battery or shine it at your skin point-blank on turbo, every month, repeatedly causing burns on the same place… and I’m not sure if even those would do the trick. But a tiny trickle of blue light is harmless.
Well, the power you can push in the case of the D4S.
The highest current 21700 can push 35-40A. So, for people like Dale, you can put something like SST40s/Luxeon Vs/XPL2s and push even more power through for like 15 seconds.
Tesla designed the 21-70 to be optimal for their very specific requirements.
Which may or may not align with what’s optimal for torches or other consumer applications.
Too fat to be applicable to e.g. laptop cells or other stuff. Laptops in particular are going slim and light, with pouch cells.
As is every other EV manufacturer AFAIK. In the next two years the mainstream manufacturers will be launching real world affordable EVs, and no, they won’t be using a big pile of steel cased 71-20s, but big bespoke bagged cells, which pack far better. And can be thermally managed far better.
I sense some bandwagon jumping by those who blindly follow Tesla’s direction. They have built their Gigafactory(ies) based on a certain (bought in) manufacturing process which bought them fast time to market, and are pretty much committed down that path, but history will decide whether that is the best direction for the future. Or whether Tesla make it.
No other mainstream auto manufacturer seems to think so.
TK, thanks for taking the time to show us how this D4S will become
I’ll wait for the final specs to be disclosed, but what was advanced make me like this light! It will be my first in 26650 format, so I’m curious about it!
BTW, those changes on the UI seem nice and, in some way, more practical than on the D4!
Let’s seen when it finally comes to public :sunglasses:
One thing I like about the 26650 format is the extra room it gives to spread out the LEDs on the MBPCB.
Although, I have never owned an 18650-based triple or quad, I have always been suspicious that the optics on some of those lights are covered a wee bit by the bezel. In practice, I doubt it makes much difference in output, but, hey, every little bit counts.
Maybe these are the LED choices.
On Int-Outdoor there are new Led-Boards and looking like fitting the D4S. Hi (4000, 5000, 6500K) und Nichia (5000 90CRI)
How difficult will it be to exchange these cyan coloured micro-size LEDs by red coloured ones? Are these LEDs hard to get or is it a standard LED that can be bought at Mouser, Arrow, Kaidomain and so on?
I wonder why Hank took cyan/blue LEDs. Red light would be better for maintaining oneself’s night vision ability and - IMHO - looks more fancy like those unaffordable Oveready BOSS lights. Green light would also be a better option for the human eye is most sensitive on the wavelenght of green light (~ 550nm). So, green light even at micro-lumen-level would be far better visible than blue light.
Maybe all this has something to to with John Rambo?
This looks great, longer high lumen runtimes than the D4 with more thermal mass. Makes me glad I haven’t snapped up a D4 or a different 26650 light yet so now I can say I need this for two reasons.