Fantastic work! I’ve been hanging out for someone to do this.
Cool ... Thanks ! ... Now let's see it grow ..... :)
Awesome, this will be a terrific resource!!
Have you thought of doing a Google Spreadsheet instead? Just make viewing of it public. Way easier for you.
Throw greatly reduces lumens. There was some discussion of that topic on my lumen measurements post here
Hey Johnny do you have 4 Xtar 2600 you can test the King with? My reading seems lower than it should be.
Thanks JohnnyMac! I think everyone who has some kind of measurement device should take readings, and if we all pool our results together our knowledge will grow and we can analyse all kinds of things about the lights for example, uniformity of light outputs, output, throw, etc. Because as always, more sources = more accuracy (that is if people follow the same testing method for all their lights).
Sorry, I don’t. I only have 2 of them. Never bought more because they just didn’t impress me.
Yeah I’m not getting any more. I’m going for some CGR Panasonics or unprotected Sanyo next time.
Johnny,
Just wondering as a useful resource would it be good to have a lumen rating at 30 sec and a 2nd at 3 mins so as to show how output changes or doesn’t once the light has been on a while. A bit like the ANSI FL1 standards, but giving us a comparison.
Also are any of your lights modded?
+1
There are many variables involved here. In the first few seconds most lights sag a lot (say 10-30% -it also depends on the heatsink modding level) and so does the battery voltage of a newly charged battery (perhaps it was better to measure at 3.7V at the flat part of the discharge curve).
Even with precise measuring equipment it is unlikely that two persons will measure the same output on their respective lights of the same model.
Numbers should always be presented with details of the measuring setup and procedure.
(perhaps I’m just a grumpy old man? |( )
+1
3mins is definitely a point where I see all flashlights truly show their constant lumens after voltage on load drops, aluminum is heated and the temperature is forcing the LED to drop the vF.
Got a stock incandescent MiniMag and fresh AAs? 
This is great! Thanks for taking the time to do this.
Guys, let's not over complicate this. Yes...ideally it would be nice to have a database containing every aspect of a light, including runtime charts, beam profile, heatsoak, and lumen output throughout the entire run of the battery.
Probably not going to happen... There are many different ways people use there lights. Take me, for example: Some of my most used lights are at work doing inspections...but they're quick inspections and aren't on for more than 10-15 sec, much less 3 minutes...but like I said, that's me. Also consider this: Can one really notice a slight drop in lumen value over the course of 3 to 10 minutes? For example, say Brand X light puts out 300L on start-up, but drops to 270 after a certain time period. Can one truly tell the difference after staring at the beam the entire time? I know I can't.
I'm about to post up here a lot of my own data to be added to the list. My measurements were taken just after meter stabilization, which is anywhere from 10 to 30sec.
Want to know what it is after 3min? General rule of thumb here - Subtract 10% and you'll be pretty close.
-needmoresleepMatch
>>>>>>>>>>it’s a SkyRay A0 clone, here is the light : http://www.ebay
Thanks for the answer. I saw those two 800+ lumen fireballs and I literally couldn’t control myself and couldn’t wait, so I ordered the F15. The sky ray clone could be the next one after that though.
This lumen chart will cost me money!!!
No more guessing. I — for one — find this one of the handiest tools that BLF has to offer, even more so once it gets fleshed out.
Thanks again to Johnny Mac!
Here’s an example of a broken rule of thumb. It is a 6W MR16 bulb being driven by a precision power supply. Driver power changed less than .005W over the 18 hour run. The light started at 420 lumens and was down to <280 lumens and still dropping (1 lux = 1 lumen on this graph). Although the temperature fairly well stabilized after 15 minutes (those pulses on the temp line are the AC cycling), the light output kept dropping.
Bravo Zulu, JohnnyMac !!!
Your Reviews and now Your Lumen and Lux Values, are VERY IMPRESSIVE.
They really help take the guess work out of deciphering the Chinese formula for the Lumens question.
Thanks Johnny,
Knee any better?
you are completely correct, however a standardized set of conditions helps compare lights, say 10-30 secs after starting, freshly charged battery at 4.2V, model preferably listed (when possible).
For popular lights some followup would be nice, 4.0V and 3.8V, and 15 and 30mins of constant running (constant running starting from fully charged battery). I doubt many lights would get the popular light treatment, but even a half dozen best models that do would be extremely informative. I’ve been trying to put together such data from my cyclone c88, but as my PMs to you illustrate i got a dud.
Here's some to add to your top list Johnny :)
| FLASHLIGHT | TURBO | HIGH | MEDIUM | LOW | Lux@1m | NOTES |
| Zebra SC600 | 755(h1) | 60.2(m1) | .05(l2) | 7,750 | ||
| Nitecore EZ AA (Stock - eneloop) | 110.7 | 7.11 | ||||
| Nitecore EZ AA (Stock - 14500) | 190.5 | 13.4 | ||||
| Nitecore EZ AA (Mod - eneloop) | 95 | 10.3 | Emitter Swap to xpg r4 3d | |||
| Nitecore EZ AA (Mod - 14500) | 322 | 13.4 | Emitter Swap to xpg r4 3d | |||
| MG P-Rocket xpg (stock) | 276.7 | 95.7 | 15 | 8,400 | ||
| MG P-Rocket xpg (Mod) | 332.8 | 108.5 | 17.6 | 13,000 | Emitter swap to xpg 2 1a | |
| Manafont UF 3mode xml drop-in | 838 | 280 | 49 | 16,500 | Drop-in not current regulated | |
| Streamlight Stylus Pro | 18.3 | |||||
| Yezl Z1X xml | 814.2 | 118 | 50.1 | Light not current regulated | ||
| Trustfire F23 xpe r2 (eneloop) | 55.3 | 6 | ||||
| Trustfire F23 xpe r2 (10440) | 136 | 13.4 | ||||
| Fenix LD01 (stock - eneloop) | 70.3 | 22.1 | 2.7 | |||
| Fenix LD01 (stock - 10440) | 221.3 | 59.3 | 3 | |||
| Fenix LD01 (mod - eneloop) | 68.8 | 22 | 3.2 | Emitter swap to xpg r4 3d | ||
| Fenix LD01 (mod - 10440) | 268.9 | 69.4 | 3.3 | Emitter swap to xpg r4 3d | ||
| Fenix LD01 (mod - eneloop) | 93.8 | 30 | 4.3 | Emitter swap to xpg 2 1a | ||
| Fenix LD01 (mod - 10440) | 347 | 79.6 | 4.3 | Emitter swap to xpg 2 1a | ||
| Coast Led Lenser V2 (3xAAA) | 55.3 | |||||
| Mini Mag (2xAAA incan) | 10.1 | We've come a long way... | ||||
| ITP C7 (eneloop) | 81.4 | 3.6 | ||||
| ITP C7 (14500) | 142 | 4 | ||||
| Romison RC-G2 xpg R5 (eneloop) | 111.4 | Shiningbeam version 2 | ||||
| 6x XML Mad Match | 5,100 | 35 | ||||
| SB S-Mini xpg (stock) | 237.2 | 111.5 | 5.5 | initial output is 274.3, but drops fast(30sec) | ||
| SB S-Mini xpg 2 (mod) | 327.3 | 130.2 | 6.8 | 6,650 | Emitter swap to xpg 2 1a | |
| Jacobs A60 xre r2 | 218.2 | 55.3 | ||||
| Thrunite T10 (eneloop) | 129.6 | 12.5 | .087 | |||
| Thrunite T10 (14500) | 355 | 146.2 | .087 | heats up fast and med mode not stable |
More to come!