Added some size comparison shots. I understand why the tail switch is added. Due to the lack of thread anodization, mechanical lockout isn’t possible otherwise. For an 18350 light, it’s a bit on the larger size, but having the ability to adjust the brightness precisely, and with infinitely variable sub-lumen, it’s a winner.
One downside is the lack of integrated LVP, and it also won’t take flat top cells. Luckily, it does work with a Convoy spacer. Just gotta be careful not to let it drain too far if using unprotected batteries.
Lastly, with a single extension tube, it works with AA/NiMH. However, it might be trying to push the battery a bit too hard, so I’d probably not use it in this config. Good to know it works though.
![[NEW] Wurkkos HD17 Powerful Headlamp, 2500 Lumens, 220m Beam Distance, Spotlight Floodlight & Red Light,Constant Current Driver＆ Simple UI](https://www.edctips.com/wp-content/uploads/2026/03/sjzd5e9jgmmg1-770x515.png "[NEW] Wurkkos HD17 Powerful Headlamp, 2500 Lumens, 220m Beam Distance, Spotlight Floodlight & Red Light,Constant Current Driver＆ Simple UI")
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Added some size comparison shots. I understand why the tail switch is added. Due to the lack of thread anodization, mechanical lockout isn’t possible otherwise. For an 18350 light, it’s a bit on the larger size, but having the ability to adjust the brightness precisely, and with infinitely variable sub-lumen, it’s a winner.
One downside is the lack of integrated LVP, and it also won’t take flat top cells. Luckily, it does work with a Convoy spacer. Just gotta be careful not to let it drain too far if using unprotected batteries.
Lastly, with a single extension tube, it works with AA/NiMH. However, it might be trying to push the battery a bit too hard, so I’d probably not use it in this config. Good to know it works though.