I would like to announce the next new Wurkkos diving flashlight called DL70, probably the most powerful, compact diving flashlight available. It will be a big upgrade from their DL40 model, now offering up to 13,000 lumens of output. More information as well as a BLF promotion to come anytime soon. Please stay tuned...
Battery options: 2x 26650 Li-Ion battery, not compatible with 18650 or 21700 (maximum length in total: 132.5 - 135mm)
Dimension: 209mm (length) x 60mm (head diameter)
Weight: 395g (without batteries)
double spring with gold plating for optimum electrical conductivity and low resistance
Toughened mineral glass lens
Impact resistance: 1m
Water resistance i.a.w. IPX-8, 100m under water
Reverse polarity protection to protect against improper battery installation.
Advanced Temperature Regulation (ATR) technology: ATR automatically reduces the brightness level when the driver temperature reaches 55°C to prevent overheating
Low voltage warning: When the battery voltage is low, the LEDs will start to flash quickly twice every minute as a reminder to replace the battery.
As of 06/2021:
If you have any questions or comments, no matter if commercial or technical, please contact Wurkkos directly. Thank you for your understanding.
I’m not too familiar with buck drivers, but 13,000 lumens would still deplete them in no time. Also no idea whether the water would keep it cool enough to stop it stepping down
I’m comparing It to the single battery Fet driven quad xhp flashlights, i think there Will be timed and thermal stepdown,but under water you still get stable output in High mode
I did a run time chart of the 3000 lm Sofirn SD05, with the light underwater (an awkward setup). It only stepped down due to the unregulated driver and cell voltage dropping.
13,000 lumens is a lot but I wouldn’t be surprised if it can sustain at least half that until the cells are empty.
Hopefully someone will review this and put it to the test.
Yes, same UI as in DL40. No timed stepdown but ATR with a threshold set to 55°C. XHP50.2 was told to be around 5.500K, so not as coldwhite as you might expect.
Well, in order to actually perceive twice the brightness of 4000lm you would need to multiply that number by four, i.e. 16000lm. So, 13000lm of the Turbo mode is quite close to being twice as bright as High mode. It will get interesting to see at what output this model will settle at 20°C on air or submerged in water.
Agreed, I will forward your suggestion to Mark. But I fear it is too late already to incorporate a mode in between of High and Turbo. Production has already commenced.
The PLB cells Sofirn stocks can handle 20A CDR, but datasheet says 10A max. I tested at 20A and it handled it nicely while only reaching 70°C. Beats most 5000mAh 26650’s out there
Hopefully the driver restricts the current draw to safe levels. But two 50.2s per cell would be a ton of current and too much for anything but maybe a Golisi gold, and likely still at dangerous levels. The ATR should at least intervene and keep the cells safe in air. IDK about underwater.
Another thing to consider with CDR ratings is cell aging. IR goes up with cycles and therefore temperature rise. Abuse the cells repetitively and it can get ugly sooner than you might expect. 5mOhm extra IR can equal tens of degrees C
