I received this D4 on loan from a friend because I was curious about the UI. I have been EDCing a Jetbeam Rotary for several months now, and was curious about the electronic ramping of the D4.
First impressions of the D4:
cool ramping!
fun playing with the stepped ramping, I like it better than the smooth ramp
with a protected 16340 about 570 lumen max
with an IMR 18350 about 1000 lumen max
the light was stepping down in muggle mode, so I calibrated the thermal sensor
it works very well as a room thermometer now
the light got ridiculously hot on maximum, so I configured max thermal to 31C, that made it step down from maximum, to about 300 lumens in less than 10 seconds
having learned that the thermal regulation is in play above 300 lumens, I proceeded to
then set the ceiling on ramping to about 300 lumens.
I set the bottom of the ramp to minimum, both in “smooth” and “stepped” ramping modes.
I set the stepped ramp to 24 steps, like an HDS. Noted that the D4 has the ability to toggle from maximum to last used mode, also like an HDS.
muggle gives about 2 lumen minimum, 200 lumen maximum
lowest low varies between 0.05 to 0.03 lumens as the battery loses charge…
tried the candle and lightning blinkies… not for me… but yikes! there are some really irritating strobes… very effective options for alerting drivers when I am a pedestrian crossing the street in the high traffic area where I live… There is also a very nice bicycle mode.
compared to my N219b 4500k, the 5000k 219c is less pink, no surprise there…
the battery check mode is very handy, and accurate!
there are lots of clicky codes that require me to read a manual, which works well and is easy to understand
I cant see the flicker, nor the PWM, with my naked eye in either mode
Impressive little pocket rocket, with a complex and feature rich UI.
Now Im going back to my N219b 4500k Jetbeam TCR-1, its so much more relaxing to use… No batt check, no strobe, no multi modes, no memory, no LVP, no clicking around.
Choices are good.