Sofirn SP70 Alone $50, PM for AMZ US CODE(LIMITED)

What a pity if they can’t make it right regarding of throw.

Has anybody checked with that calculator?
Reflector Tool

I think this is from the thread from
Enderman:
Advanced calculators for theoretical lumens, lux, beam divergence, and more, of custom LED flashlights
For FLAT Leds, domed will be false
Q: Advanced calculators for theoretical lumens, lux, beam divergence, and more, of custom LED flashlights

I think that’s exactly why. “Most” people test their lights indoor on a white wall and when they see those ugly artifacts, it will either be returns time or negative reviews.

I’m going with the masses on this one. Unless they can get a SMO highly polished thrower out of this I cant justify it over the many multi-emitter lights I already have.

I see a few things:

*please do not revive the myth that the depth of the reflector affects the throw number in a significant way, it does not, never did, never will. Can you guys and Sofirn leave that theory out please, for sake of designing a proper flashlight. It is the area of the front opening that makes the throw, that area is very close to lineair with the kcd.

*as Zozz pointed out, that beamshot most likely shows a led that is not focussed in the reflector, no wonder that it is ugly. It worries me if the Sofirn engineers missed that, for my confidence in Sofirn I even hope it is something different.

*7500 lumen sounds pretty good to me, good output but the led is not squeezed to the max.

If this light can be somewhere between an Acebeam K60/K65 with a different battery tube/UI I think it would be successful. Both of those lights are 88-90mm head diameter and use xhp70/xhp70.2 dedome and throw between 700-1000M. I don’t expect Sofirn to dedome or otherwise compare to a light triple its price point. However, no frills + cheap FET driver is fine at this price point.

They may have simply used the centering ring from the S70 as I’m sure they have plenty in stock.

Even that particular centering ring I think is not very well optimized for the S70 because I see a donut pattern with the xhp70 even though the reflector is a heavy OP. The stock L6 had a similar reflector and emitter, but the hotspot was much nicer with no obvious donut pattern.

So they may need to make a new centering ring just for this light.

It depends on how it’s measured. I’m squeezing 17A out of both a 6500K and a 5700K 70.2 and only measuring 5300 lumen at turn on and 5100 lumen at 20 seconds. This is using the TA Lumen Tube calibrated with Maukka’s light.

So if Sofirn was measuring 7200 lumen using their 21700 battery it probably means their integrating sphere is calibrated to read higher than mine. Still, I doubt it’s much higher. It would be helpful to know how many amps it pulls at the tail.

Basically, their 21700 battery can pull some high amps, so it MAY be maxed out. I know 4 x 18650 can push the amps up higher to over 20A, but we are limited to 2 batteries.

You are right, I did not have the XHP70.2 numbers correct in my head, if they really got 7200lm OTF, the led must be driven close to 20A and is maxed out.

Don't these numbers also depend on the voltage you apply on the XHP70.2? So, with 12V instead of 6V you need only half that current to run the LED, right?

Yes but it’s a 2S configuration w/ FET so kind of implied it’s 6V

It’s the same wattage or power which is: Watts = Amps x Volts

6A x 12V = 72W
12A x 6V = 72W

In my Convoy L6 XHP70.2 it draws 17.4A and I got 7740 lumens with 2 liitokalas.
In the mentioned Acebeam lights there are 4x 18650 which has more power than two 26650.
So 7500 lumens in SP70 is good to me.

I mentioned the Acebeam’s more because of reflector size and type. One has a very polished and subtle orange peel and the other has a very polished SMO and they both get good throw for what they are, max lumens aside.

Acebeam does not use FET drivers. Their output is less.

It almost looks like as if a part of the LED is dead? Maybe it burnt out in there picture?

Do SST-40 (single) with current-regulated output and no step-down in K70-sized head.

I don’t see it.

Sorry, wrong light.

The idea of the SP70 is an updated version of the L6 and S70. For example, having the newer XHP70.2 emitter and a high powered driver. Two of the most common mods people do with the L6/S70, but in a factory package which means no mod skills are needed and it’s cheaper.

This is why I was interested in this light. I want an updated L6 with a better UI and the latest 70.2, hopefully in NW.

Personally I want the light as floodly as possible, I already own a dedicated thrower.

Thanks again Jason for helping organize this.

Depth and diameter are the equation for throw, or any other beam profile for that matter. It’s not a myth, just cold hard facts. The ratio between diameter and depth needs to be nearly square, or 1:1, for an optimized beam profile. Stay shallow, you pay a price. Don’t believe me? We went through all that with the GT, and others that I have personally worked on. I have assisted in the design and production of 2 reflectors that each exceed a mile in throw, even with a simple XP-L HI and a single cell. So let’s not get all into that “myth” junk all over again, it’s very real!

Flip chip dies very often put that purplish blue tint in the hot spot. Part and parcel of the new technology. There are ways to address it, don’t know if Sofirn wants to go that route.