My green XP-G2 S4 3D came in today. The slew of tiny LED’s on when the light is off is just stunning! Output is really pretty too, nice tint from the XP-G2 3D, have a Shockli 5500mAh 26650 button top charging up and I’ll get lumens and lux numbers. Sorry it’s taking me so long Valera, wife wasn’t feeling the greatest and needed me to go with her to get groceries…
An initial read on Turbo showed me 3529 lumens with the cell down around 4.09V as I recall… (I wrote down the lumens numbers but didn’t write down what the cell showed when I stuck it in the charger, should have)
EDIT: Forgot to mention, it is NOT glued, bezel comes off easily enough and the optic falls right out.
The 219c version is identical except that the FET part of the ramp has all the values multiplied by 80%. This is to reduce risk of making the emitters burn themselves. The D4 also has a 219c version, but I didn’t have the automated multi-target build system in place at the time so it’s not included in the automatic builds yet.
The stock hex files aren’t really published, but the source code is. If you flash back to RampingIOS V3, it may be best to build from the latest source in case there are any updates or bugfixes. Maukka found a bug that I hope to fix soon — usually the stepped ramp works as expected, but when given some specific config values it behaves a little weird. The specific values are floor=1, ceil=146, steps=10 (1 click, 5 clicks, 10 clicks). So I’m hoping to fix that soon and send new .hex files to Hank.
I tried translating the code directly to Python for testing, but the bug doesn’t happen there. So I suspect it may be an integer overflow issue or something. Next I’ll try exporting the relevant bits of code to a standalone C program, and then have it test every possible set of values, to identify the cause of the issue and make sure it’s really fixed.
Would it be possible to request for the updated RampingIOS .hex files when they get updated? (So far, I have only learned how to flash pre-existing .hex files, but not to build .hex files from source code…) Thanks in advance.
I swapped the XP-G2 S4 3D’s out for Samsung LH351D 5000K at 80CRI. On the Shockli 26650 at 4.13V it’s making 4988.7 lumens. I used 18ga Turnigy leads and synthetic diamond thermal compound putting it back together.
When I charged up the Shockli to begin with, the XP-G2’s didn’t show above 3529 lumens.
Yes, even turbo is limited to 80%. There wouldn’t really be any point in limiting the power if it didn’t apply to turbo, since it’s the primary mode which was giving people problems.
I suggested LH351D as an alternative since, from what I’ve heard, it doesn’t run into the same heat issues. But I don’t know if that will happen. Ideally, I think it would work well to do 2x4000K and 2x5000K, both at 90 CRI.
Wow that’s insane! I just got my D4S XP-L HI 5D tint and my TA lumen tube calibrated with Maukka calibration lights measures 3,800 lumens at turn-on using two different Shockli fully charged. I’m surprised the LH351D can make that much more than the XP-G2. On my M43, the XP-G2 5D is brighter than the XP-L HI 5D, which is also much brighter than the LH351D 4000k 90cri.
I’m also very impressed with how nice the auxiliary lights look. Just an idea, would it be possible to make the auxiliary leds glimmer individually by a future driver update? If that’s too hard, maybe having the LEDs “breathe” simultaneously.
I think my Samsungs are U6 binning, lot of room on top but they’re considerably brighter than the current 90CRI offering which is why I went with the 80’s… splitting differences as it were.
In terms of max lumens on XP-sized emitters, the scale is generally (from most to least):
XP-L2 HD
LH351D
XP-L HD
XP-L HI
XP-G3
219c
XP-G2
219b
XP-E2
If I recall correctly, at least. Assuming other things are equal, like color temperature and CRI. Warmer tints and lower CRI generally produce fewer lumens per watt.
So it’s not at all surprising that a LH351D would beat XP-G2 on lumens. It’s enough steps above that it can still put out more light even with somewhat higher CRI.
The Meteor isn’t a very good way to gauge emitter capabilities. It doesn’t run the emitters as hard as they can go, and it is limited by Amps instead of Watts so it will generally deliver more power to older higher-voltage emitters, like the XP-G2.
Not really. The breathing effect costs a lot of power. Instead of just powering the LEDs (0.03 to 0.90 mA), it requires keeping the MCU awake to pulse the emitters on and off fast enough that it looks like it’s dimming. The MCU by itself requires several times as much power as the LEDs (2 to 6 mA). So “breathing” mode would be less bright and have only a fraction as much runtime.
You could make it “breathe” by changing the firmware, but I don’t think it would be worthwhile.
The availability of the Samsungs to date shows us only about mid range output levels. The binning goes up to “W” and then in increments of 1 all the way to 9… I used U6 bin so as you can see, there is a lot more to be discovered from Samsung while Cree is being left behind. The XP-L2’s are not very pretty for flashlights.
Given a disregard for CRI clarity, there are some significantly more powerful Samsung’s available that easily match the Cree XP-L2 in output, showing over 2000 lumens per emitter. I opted for the 80 CRI in 5000K tint to achieve some of the best of both worlds, but am seriously considering going for some of their top bins available just to see what gives. I mean, sure, 5920 lumens sounds really nice and all, but it’s only a measly 1480 lumens per emitter, now on the other hand if I’d left smaller wires in place and purposely limited high current draw then it would be easier on the light, give a more efficient output and in a very pleasing tint with high color rendering. So perhaps it’s time we look at quality a lot harder than quantity.
The tail magnet is so powerful in mine I was walking around with a c-cell battery attached to the outside of my cargo pocket, until my son asked me what kind of voodoo I was performing. I also wondered how long I had my fly open
I want to say thank you for putting this all together…. Along with Toymaker providing updated configs, it really helps people like me getting into the hobby of flashing flashlights.
Output is really pretty too, nice tint from the XP-G2 3D, have a Shockli 5500mAh 26650 button top charging up and I’ll get lumens and lux numbers. Sorry it’s taking me so long Valera, wife wasn’t feeling the greatest and needed me to go with her to get groceries…
