Short Review of Sofirn SP33 v2 with XHP50.2

Thanks for the driver photos!

It looks like it is using the TI TPS61088 boost converter.

Edit: And it looks like this is how an switch current limit is set.

There are other ways to do current limiting though, using an op-amp and the voltage feedback pin.

I have this light and for $20 it’s a bargain, 2400 real lumens and 1000 sustainable lumens, with great UI (click on click off)

The things I don’t like:

-Tint: it’s cool, a 5000k would be better
-Can’t go from moonlight to regular modes, you have to turn off the light and then turn on with a single click
-Can’t turn off from turbo, you need two clicks, first click gets you to previous mode and second click to turn off

Oh, i never noticed. I guess i only use turbo for short periods.
Trying it now.
Aha, yes it does step down after a minute or so.
Ooh, it’s hot !
But it doesn’t step down based on battery voltage or current or does it?
At least not as early as the SP33.

When you go to turbo from OFF it’s just one click to turn it off.

Awesome!
Thanks, Jason. :+1:

That’s very good to know !
Hopefully we can identify the resistor and replace it.

so who will slice the led? just ordered mine. usually shipping is pretty fast.

Switch mod.

.

Placed my order from their Aliexpress store Nov 14.
Tracking shows light was shipped Nov 26.
No updates since then. 30 days later and it hasn’t left China yet.

it is a busy time for the chinese and sometimes just bad luck i guess. my most recent sofirn took 11 days after they shipped it

If you don’t have updates, how do you know it’s still in China? My light took 27 days, but I ordered it a month before Thanksgiving. All deliveries are going to take longer during the holiday season (from about mid October to mid January). I had a 20 day gap of no updates. It seems yours got shipped 10 days after ordering, mine was 4 days after. I would guess you’ll probably see some updates in the next week or so. Once it hits the US, it can be delivered pretty quick. I wouldn’t stress too much about it.

Mine will be here today. 32 days.

When a package leaves China, the EPacket tracking shows it was sent to the USA.
When it arrives in the USA, USPS tracking shows it arrived.
Neither of those 2 things have happened, so I have no reason to believe the package has left China yet.

I have had packages arrive without ever getting any tracking info. That’s usually from dishonest Aliexpress vendors giving me a bogus tracking number to extend their shipping deadline.

My tracking went from “in transit in country”(China) to”arrived in NY” very quickly.
Seems to have missed a step or two.

Jason would you please give me a detail of side led mod

I need to do it over using a smd led. Parasitic drain is crazy high. I ordered some 3x3x2mm trim pots so I can easily adjust the brightness. I’ll post pictures when I redo it.

I noticed that sp33 has relatively short run time on high, less than the c8f and about the same as the sp32a. Is the XHP50 a less efficient emitter?This is from the Sofirn specs. (I know the 26650 an 18650 run times are reversed for the sp33 chart)

I’m in the same boat, ordered 11/11, shipped 11/26, no further updates.

I never pay attention to factory run time charts. They rarely give all the details and are usually way off.

As far as efficiency (power used/lumens out) the xhp50.2 is pretty normal. Consider it’s using 4 x XPG2 (or XPG3?) at a fairly low current where their efficiency is better. The SP32A uses a single XPL at a much higher current where it’s efficiency is poor. The C8F uses 3 x xpl so it’s efficiency should be better, about the same as the xhp50.2. Then you have driver efficiency and the reflector/lens efficiency. They all factor in. Then the manufacturer lumen ratings might be off a little. The C8F uses a FET driver so it’s brightness level drops as battery voltage goes down. The SP33 v2 is a boost driver and mostly maintains the brightness levels. The SP32A I’m not sure what driver design it has. Etc… :weary:

It’s too complicated for me.

I guess I won the ‘AliExpress Shipping Lottery’…… for the first time ever!! :smiley:

I placed my order 23 November 2018 & mine just Processed Through Facility ISC MIAMI FL (USPS) today.

It should be here soon… “should” being the operative word. :+1: . :wink: