Here's the inside of a Wurkkos HD20 : r/flashlight
20350 short tube Tube Work for Wurkkos HD20, TS21
Wurkkos HD20 Right Angle Flashlight Rechargeable Headlamp with Spotlight and Floodlight,IP68 Waterproof,Max 2000 Lumen,Magnetic Tailcap,Reverse Charge,Bright Angle-Head Flashlight and toollamp - - Amazon.com
$41.98 (Free or Cheap Shipping) Wurkkos HD20 USB-C Rechargeable 2000LM 5000K LED Flashlight Headlamp w/ Battery (Green, With Battery) at m.FastTech.com - FastTech Mobile
Wurkkos HD20 Headlamp Review - ZeroAir Reviews
First NLD - Wurkkos HD20! Had a super crappy cheapo headlamp and a super old work light go out in the same week; did my research here to replace them both at
Wurkkos HD20 Right Angle Flashlight Rechargeable Headlamp with Spotlight and Floodlight,IP68 Waterproof,Max 2000 Lumen,Magnetic Tailcap,Reverse Charge,Bright Angle-Head Flashlight and toollamp - - Amazon.com
Wurkkos HD20 Headlamp Review - ZeroAir Reviews
Wurkkos Hd20 Usb-c Led Flashlight Rechargeable 2000lm 21700 Headlamp Dual Leds Light Spotlight Floodlight With Magnetic Tailcap - Headlamps - AliExpress
HD20 Rechargeable Headlamp 21700 Flashlight 2000lm Dual LED LH351D and XPL with Type C Magnetic Tail
Wurkkos HD20 Right Angle Flashlight Rechargeable Headlamp with Spotlight and Floodlight,IP68 Waterproof,Max 2000 Lumen,Magnetic Tailcap,Reverse Charge,Bright Angle-Head Flashlight and toollamp - - Amazon.com
The newer Wurkkos HD20 appear to have a threaded bezel on the bottom now, which would make swapping both emitters much easier. I know several people had asked about emitter swaps in