FREEME ✌ ASTROLUX FT03S SBT90.2 4500lm 1428m 26650/ 21700/ 18650 Flashlight - EXPIRED

Thanks for the explanation. I was hoping for a wider spill in addition to the increased brightness, but it seems that something like a fused quad reflector would probably provide the best combination of throw and spill for my preferences (but not necessarily for my wallet!).

Forgive my ignorance, I sincerely believed that the size of the hot spot is controlled not only by the die or dome size as much as by the shape of the reflector? What part does reflector play in th shape/size of the thrower’s hot spot then?. I though with the right reflector a light can have a much wider hot spot at a certain distance ,(with a smaller emitter )than another light with a much bigger emitter but a differently shaped reflector ( at same distance)? Am I wrong?

Everyone’s measurements are different but let’s say the Thrunite is doing 170kcd. If the SBT90.2 is pushed hard enough it could probably do 40% more but that’s still only 238kcd. The FT03 pushed to the same levels should do 450+ with performance similar to the TN40. How I came up with these numbers is I looked the K75 SBT90.2 which has a smaller head than the GT/MF04 (XHP35 HI) and still beats them in intensity by 30-40. The Acebeam T27 which has the same emmiter (XHP35 HI) as the Thrunite V6 does 340kcd so it should do 476 kcd (40 more) with the SBT90.2. THE FT03s head is the same size as the T27 so the performance should be pretty close. The Thrunite could be better with a deeper reflector but it still wouldn’t be able to match the FT03. I do get what you’re saying though about making a more compact light. I think a shorter version of the NI40 with a side switch would make a lot of sense.

Oh yes, I’d give everything for a side switch……

I focused on the effect of the LED rather than all variables. Yes, reflector proportions and dimensions are just as important as LED when it comes to spot size.
A very good writeup is here:

Long story short:
Nearly all reflectors are sections of a parabola. Sometimes longer, sometimes shorter. Or the same in other words - deeper or shallower.
Hotspot intensity is proportional to reflector area.
Reflector shape being equal, spot diameter is proportional to reflector diameter.
Deeper reflector of the same diameter has smaller hole in the middle - so it throws better, but only slightly.
It also puts more lumens to a beam (not very much typically), but makes it less defined - the spot is smaller but it comes with a larger corona.

[quote=Cloud]

…and it would be nice to have a smoother switching of brightness modes, 6 modes + turbo

Didn’t know that. Now it makes sense to me that my L16 and FT03 have a noticeable corona whereas the GT mini doesn’t.

Interested.

The large head is needed for two reasons.

  1. Larger deeper reflector=more throw.
  2. Larger head will handle the heat better.

The SBT-90 performs best in a large light.

Im interested

How much estimate allowance for the spring when using a 21700? Fully compressed? What will be the cons for a fully compressed spring? Adding much more resistance and create more heat and having a chance that the spring will collapse?

I have some P42A that I have no confident or not comfortable using them on the FT03.

is nobody worried this host is a bit too weak for this kind of emitter and lumens on highest ??

Sent.

A few people already expressed their worries in this thread.

Myself I’m not worried, I like hot rods.

Interested

Are codes being sent yet? I’ll take one for sure.

Is the code available now?

Current is in the mid-twenties. I believe the tiny D4 already draws 16A, so you have only seconds on turbo but people are ok with that. Mass and surface of the FT03 is way higher so it should be ok. The main worry is if Astrolux has adapted the circuitry enough well to all those amps (the D4 has great connctions inside), any weak electrical joint will break eventually.

Interested in one

Interested
Thanks