I’m fairly new to BLF — I used to carry simple AA/18650 lights, but recently got interested in something with more oomph. I’ve just finished assembling my first 21700-based flashlight:
Host: a compact 21700 body I bought online
Driver: a generic boost/buck driver I found cheap but rated for high output
Emitter & LED: a high-CRI neutral-white LED (≈5000 K) — I like the tint, but not sure if I sacrificed throw or efficiency
Before I fire it up, I wanted to ask for advice from more experienced BLF members:
Is this configuration (21700 + boost/buck + neutral white LED) reasonable for beginners? Could there be any hidden dangers due to current/heat dissipation issues?
If an upgrade is to be made in the future - for instance, if a longer long-range shot (throw) is desired - what would everyone recommend to replace first (driver/LED/reflector/battery)?
I’m looking forward to your suggestions and also welcome criticism to point out where my train of thought is off. Thank you!
Without knowing the driver details (power output and or thermal regulation) it’s impossible to say.
From a practical light-building perspective, I’d reccomend checking:
the LED is wired in the correct polarity
the reflector isn’t causing a short on the LED MCPCB
Depends what the current LED is, typically an LED with higher surface intensity will throw further, let us know what the current build is and we can advise.
Thanks! By “current LED,” if you mean the emitter type, it’s a Nichia 219C 5000K 90CRI.
I know it’s a floody, high-CRI LED, so maybe not the best for throw.
Certain emitters of the 219 series (219b, for example) are highly rated for light quality, however, none are particularly high output or have a high surface intensity.
If you want more throw, go with a “de-domed” LED or perhaps a 519a and dedome yourself (note the CCT and tint will shift with the removal of the silicone dome).
