Review: UltraFire T90 SST-90 3x26650 Flashlight from Wallbuys (Picture Heavy)

Was dragging my posts because of the thousand post giveaway… Excellent light, excellent review… I am curious as to the variations in performance between the two. The ones that use 18650 & 26550… Any ideas?

It outthrows the HD2010 stock, and with the mod really outthrows it. No outdoor shots yet, it’s been snowing just enough to make it not possible.

I think the die size of the SST-90 and the MT-G2 are similar, so I’m expecting (hoping) the hotspot stays the same size, therefore, more throw… we’ll see :wink:

I can’t compare, but based on reading here and there, the T90 might perform slightly better (higher emitter drive current, more capable driver). I’d like to compare the reflectors, since that is where the most important difference w.r.t throw will be. Looking at the reflector sold on DX I think they are identical (and it is reported that this is the one in the X6). The dimensions match my measurements.

Thanks relic38 for the review. That thing is a real whopper. Any chance of a shot in your hand (hands)?

Here’s a not so great in-hand shot.

holy crap - that thing is 14” long!

resistor mod? Are you going to push 9A? :slight_smile:

Check the first reply for my resistor mod.

And, yes, I am pushing 9 Amps. You could push a lot more if you wanted to. :wink:

Thermal test just finished, results added to mod entry. She runs a little hot, but with some airflow, it should be OK. This was with it just sitting on a desk.

Wow. Your hand shot shows just how big that monster is. Well done on the driver mod. You really know your way around these things. A GPS would not even show me around on electrical thingys.

wow… bravo!

I updated the throw number, my lux meter is rated to 50klux, but will happily go above that and lie to me. I tested at 5 feet and 12 feet and calculated the candelas; ~73kcd after the mode. Based on the skew the meter was giving me, the stock candelas was probably 57kcd.
Not too bad. I hope it doesn’t snow tonight :wink:

very cool! ive always liked the sst90

Awesome review relic. Thank you

You should really dedome it...

I’ve thought about it, and I might eventually. I really like the beam the way it is with this amount of spill. Looking at those shots, most of the spill disappears, becoming a pure thrower. I’m not sure yet if that’s what I want from this light.

Great review with modding instructions! Thanks.

Well, I messed them up. But, what I did get was a feel for how far this can throw. I do not have many targets right near me that work well. One example was a silo at 400m. I could get enough light on it to clearly see it. If it had been a water tower, I might have read the name on it. Then I tried something further; a white barn that I thought was maybe 600 yards. I was surprised to be able to see it; dim but definitely getting light enough to be able to see it. So I get back and jump on Google maps… 900m! Really? Should I be able to throw that far with 70kcd?
Doing the math; yes, it can. sqrt(70,000)/0.25 = 1058m (0.25lux). I figure useable throw is somewhere between 0.5lux and 1lux.

I’ll get some beam shots next time, promise. :slight_smile:

I think you misplaced the bracket, try SQRT (70k/0.25) instead, should be 529m to drop to 0.25lux. You kinda need over 200kcd to go 900m.

Great review BTW.

Oops, my bad, I went by the info on FlashlightWiki I suppose is a bit ambiguous when written out. “Throw is just the square root of the light intensity in candela divided by 0.25 lux which gives meters.”
I was a little surprised that it would work out to 1000m at 70k. Still, I could see something 900m. I didn’t expect that since I thought 0.25lux would be the limit of being able to see any bounce-back. I guess the white target helps a lot.

Yup. I also can see big white swiftlet building 900m away using just around 80- 100kcd. Yes, wont be any use, can’t identify much anything but it is visible nevertheless.

Our eyes night vision has something to do with that too IMO. Once it adapts, the light just seem to throw way farther.

Any plan to dedome that giant? It definitely will break 100k (if survived) :slight_smile:

Scaru beat you to that question :slight_smile: