Metal button is glued by deault, if you prefer not to glue it, please send us a request.
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
• High end custom made optic N244M optic
• 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:
519A : 3800lm
SST-20 6500K: 4200lm
SST-20 5000K: 4200lm
SST-20 4000K/2700K 95CRI: 3000lm
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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Jacko
Good balanced all-rounder April 3, 2026
Optioned mine with NTG35 4200K X2, SST-20-DR and UV (at the cost of no aux LEDs) as a do-it-all light for nightwork, camping and taking photos of UV in nature. Very floody light good for illuminating <50m distances. If you want a a compact thrower, consider a D4Sv2 instead if you want a multi-channel light, otherwise a D1K or K1.
NTG35s have a nice rosy tint at 4200K that's easy on the eyes and has a decent warm spectrum, but if you're after perfect colour accuracy, consider selecting the 519a 5000/5700K instead. Changing channels and configuring tint ramps can be weird if you've only used Anduril in single channel lights before, so bear that in mind.
It gets hot pretty quickly running 2x NTG35s on turbo, but provides good runtime and heat management otherwise, and can run a single SST20-DR or UV on turbo for extended periods without overheating.
Also, get the magnetic tailcap. It's FAR more useful than you'd think. Raised button is easy to find in the dark. -
Xerxes
10/10 amazing June 15, 2024
The triple channel D4K is fantastic, I went with 519a’s in 4500k dedomed in channel one then deep red and deep blue in channels 2 and 3. If you are reading this review and for some reason you are still not 100% convinced just buy one already. This is my first Emisar and it will not be my last, it exceeded my expectations in every way, and my expectations were very high.
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Chris
Excellent Quality good for Visual and Blacklight Inspections April 18, 2024
1st Time purchase here. Dark Grey triple channel D4K 1*21700. Use it for Non Destructive Testing of Aircraft Parts. This Light PASSED all legal requirements. Well over 100 foot candles of White Light, (Blacklight) 5000+ UV/cm2 with under 1 foot ca of background white light.
Most Blacklights at this range would cost 800-1000 USD.
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Product Questions
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