This is single channel version, for the dual channel version, please click here
The boost driver upgrade is available for the Luminous SST-20, SFT-25, Nichia 219B R9080 and Nichia 519A R9080 LEDs, 2Amps per LED. The boost driver is not compatible with Nichia E21A, Nichia E17A or the mule versions of the flashlight. Note that the boost driver output is limited in comparison to the default driver, it is more efficient (90-95%) with a longer running time and less heat.
Emisar D4K puts a high lumen output but generates a lot of heat at the same time, please acknowledge before purchasing. Unprotected, flat top battery works only (not included in the price), D4K does not work with protected battery.
Features:
• CNC machined from aircraft-grade aluminium
• Efficient UK made Carclo Quad LED optics
• Unihead construction
• High lumen output and low moon output
• Ramping interface
• Electronic soft touch switch
• Beryllium-Copper springs with 45% IACS superior to stainless steel alloys used for springs with only 2% IACS.
• Temperature step-down
• Waterproof and dustproof to IP67 standard (up to 1 meter)
• Weight:58g
• Dimensions: 103mm(length) * 28mm(head) * 26.5mm(body)
OTF lumen output at start-up:
E21A : 1200lm
519A : 3800lm
SST-20 6500K: 4200lm
SST-20 5000K: 4200lm
SST-20 4000K/3000K 95CRI: 3000lm
SFT-25: 4800lm
This product uses free software of Anduril 2, distributed under the terms of the GPLv3.
Source code is available from https://toykeeper.net/anduril
Customer Reviews
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Kenny G
Love it February 5, 2024
Started collecting knives and pens and now flashlights. Already have a few other brands but have just unboxed my first Hank Light and wow- it won’t be my last (already have 2 more ordered)
I used to scratch my head at the SOTC posts that would seemingly be a dozen different specifications of THE SAME LIGHT but I feel this might be me soon with the D4K… -
Adam
Small, elegant and fun. December 26, 2023
Ordered mine in black, cool white switch. Quite elegant light, fits good with my PC on the desk. The fact it uses 21700 makes it last quite long. It's funny seeing people surprised that such a small flashlight can emit so much light. Best 50 bucks I've spent on an everyday item.
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Toast
D4K July 6, 2023
I got a D4K mule with 2700k and 4000k 519a dedome with the intention of using it as a indoor light. Its quickly become my favorite light, the tint is very nice. Hank also provides customer service thats hard to beat.
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Colin B.
Awesome pocket light April 27, 2023
I got mine in Grey, with Amber switch, and 519a 4500k with domes, with the boost driver, and clear optics installed. The beam is just beautifully smooth and clean, even holding it a few inches from a white wall I don't notice any artifacts. The 519a emitters are fantastic, renders color almost as well as The Big Emitter in the Sky. This is the perfect light for close to medium distance tasks at any hour. At night, turbo can light up a decently large area, but I would choose something bigger with more throw for dedicated outdoor use in wide-open spaces. Overall I couldn't be happier, it will live in my pocket for many years.
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Product Questions
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