RPi (even Zero or ZeroW) would be pretty good for something like that. A year or so ago I built a lumen tube using a Wemos D1 Mini (ESP8266) running Arduino and a TSL2591 breakout board. Super small, USB powered, and feeds out results over WiFi via a built-in webserver. It makes runtime/output charts really easy.
Nah, you’d have to pair the beasties first.
Yeah, I already got some Logitech critters that need the dongles, but wanted to avoid even that.
Put some 3000k sst20’s from kaidomain in my D4. Just love this emitter.
Sort of a mod… after the success of modding the light pods above, another friend asked if I could make a smaller single ATV light with a wider beam. Not wanting to dream up something from scratch, I put together two things I had laying around - some LED heatsink housings, and some 2” dia. round heatsink. Milled a recess to set the main body of the housing into the heatsink, and another recess to cut 1/2”–14 NPT threads that the housing base has. I don’t have a threadmill so I did this manually with a tap and 15” wrench. Not fun, but done. The “pill” only has a center hole for the wires, and I’m running the lights in parallel (partially because I shorted out and fried the Meanwell boost driver I had). So I had to open up the hole on the MCPCB and pill. The board is a triple XHP35.
Wanted to share some “beamshots” this is a more “floodier” light for me.
Here’s my control - back yard, some ambient street light, though still rather dark:
And with the light on:
The apartment building across the street is about 50ft. away:
Shedding some light on the subject, literally:
Couple of firsts for me today, been a while since that’s happened. Modded an Dereelight XSearcher for a buddy of mine with a White Flat. This was originally built up by Vinh with a de-domed XP-G2 and direct drive… it did some 460Kcd in that configuration. So I put a White Flat on a 16mm board (had issues with positive grounding) and built up a Qlite with Biscotti on it by stacking 7 350mA 7135’s. With a rested 30Q at 4.12V it pulls 4.82A and makes 775Kcd for 1.094 miles throw and this even on a 5M test! Wow! The White Flat is one serious little thrower, for sure!
Yay! My shipment of bare 4000K and 5000K LH351D arrived from Mountain Electronics today.
This is the first time I’ve tried this emitter. Going to have to swap them into something this weekend to see how they perform. 
I like the Samsungs in the D4S and E07. 
Edit: Actually my scratch built Ti/Cu Quad is where I really like the Samsungs, this is my EDC and the light I use more than any other.
i worked on my utorch sf1 today, shell cooked for cool metalic Brown color and emitter swapped with luxeon v2 5000k thanks to bilakos10 alert this great deal. sorry for the bad photos.
original tint
tear down
two emiters
new tint
new color
Today I modded a Fandyfire SP02 with a sliced XHP70.2. I bought this light about 2 years ago to be a lightweight and compact thrower. It has a 63mm head with a ~53mm active reflector diameter. I think it has the same reflector as the HD2010 and Mitko’s budget thrower light. I had a dedomed XPL V6 in it that did around 240kcd. Then I modded my Emisar D1S with a 2mm white flat that had around the same throw (and almost as many lumens) in a lighter more compact package, so I thought of other things I could do with the Fandyfire.
The quality of the machining and anodization of this light seems pretty good to me. It came with your standard pill with a pretty thin shelf. I had destroyed this pill in the process of making the light into a Fresnel thrower. I made the current new pill back when I was in the machine shop making my 7xC8 light. You have to get this reflector down pretty low to get good focus. The MCPCB is 20mm. I used folded up copper tape to make thin contact extensions, then I covered them with the thick plastic gaskets you can get from mtnelectronics. These came with XP sized holes so I enlarged with an exacto knife. The reflector hole fits just about perfectly around the XHP70.2 so no centering ring was needed. The driver is a 22mm FET from mtnelectronics with just basic FW. I want TK’s crescendo on it but that is not an option from mtnelectronics for FET-only drivers, so this will have to do until I overcome the energy barrier to start flashing FW again.
I can’t take the tail cap off easily on this light so I haven’t measured the current. With 2 charged 30Qs the output based on a ceiling bounce is about 3.8x the output of my EE X6 with dedomed SST40 at ~8A, so in the area of 6600 lumens. I measured 175kcd. The beam profile looks like the EE X6 with dedomed SST40, but with ~1.3x larger diameter. I had been wanting to do a single sliced XHP70.2 mod and I’m pleased with this outcome. It really is a potent combination of output and throw when combined with a good-sized reflector.
Modded an Electro Lumens search and Rescue torch to bring it up to date.
Nice machine work, there 
Is it just the lighting, or is that tailcap a different metal?
The tailcap is Brass.
Nice Steve!
Honking light right there! What are the specs? I mean, if you updated it what emitter and driver did you go with?
See here Dale - Electro Lumens Search and Rescue ST90 upgrade. Completed post 31, 17.2.19
It’s a level blf gt driver and xhp70.2 running 8 amps.
Another satisfying moment for ya Moose, job well done
Thanks pp. The emitter is also dedomed.
I now have the light in shorty mode with 2x18350 Aspire 1100. The battery tube was not quite long enough, so I soldered some pieces of copper to the driver ground ring to effectively lengthen the compartment. Compared to 2x 30Qs it has about 87% of the output or around 5700 lumens. A nice light-weight and compact high-output thrower.
Can we get an in-hand shot of this beast of a light? :sunglasses:
Last week I put a FET + 7135 Driver - 15mm - MTN-15DDm , with Crescendo firmware, in my On The Road i3!
It improved the usability of the flashlight and also the luminous levels.
Maybe not the “throwiest” light in the category but for a 16340 flashlight with XPL-HI U6-1A, it reaches more than 200m in throw
House @185m .
Some more photos here.
Today I reworked my number 3 set of X6/X5 lights. The little copper X5 I put a White Flat in and it does 78.75Kcd pulling some 4.5A off an Efest 14500 cell. The X6 I had previously made a spacer for and built a triple with XP-L emitters, so today I pulled the 32mm Noctigon (reflowed onto the sink which was also reflowed into the copper pill) and used a T Pad with 3 SST-40’s. It’s making some 6200 lumens on an 30Q cell, at over 18A tail reading.
I like both, but the little X5 with White Flat is impressive!
I weighed a stock X6 with a cell in it at 6.16 oz, the X6 SS/Cu with a cell weighs a whopping 16.17 oz! After handling the SS/Cu triple the little stock light feels like it has no cell in it… lol
Nice, Dale.
SST40 makes for such a good triple. They have the brighter N5 bin at KD with a lower Vf bin so it should pull even more current and be brighter. Unfortunately I just tested one and it performs identically to the N4 in output and voltage so no performance boost. Not sure if it is just wide tolerances or if they didn’t send me N5s.