The LOUDENER r/flashlight (>4500m range)

https://www.reddit.com/r/flashlight/s/vfhdbyM7Dg

Reddit link to project above.

Welcome to the LOUDENER, a rediculously pocketable thrower flashlight project!

I printed mine large mouth up, for quality purposes. Added a very large brim and slowed down speeds, both for stability.  

Specs (approx):

1.  3000 lumen (SFT-42R / 3V10A buck driver) 

2.  5.43 million candela equal to 4660m ANSI throw (2,86 miles)

3. Convoy C8+ or M21A modification 

BOM:

1. Convoy C8+ or M21A (preferably with a round emitter)

2. Printed cone and press-fit retaining ring (preferably PETG)

3. Fresnel lens Diameter = 230mm, Focal length = 190mm

4. 3 Rubber O-rings (I used 32mm ID, 3.55mm thickness)

5. Matte black paint 

Instructions

• Print the cone and retaining ring

• Paint the inside of the cone matte black (PETG is inherently shiny)

• Mount D= 230mm F= 190mm fresnel lens inside cone and press fit retaining ring

• Carefully remove the bezel AND reflector of the C8+/M21A

• Mount 3 O-rings inside the 3 "heatsink" notches of the C8+/M21A's head

• Slide cone over the O-rings.

• Adjust beam convergence by sliding the cone up/down (shouldn't take much, best done outside)

Info:

• The lens can be found on alie.xpress. Make sure it's the right size and focal length.

• The O-rings do not need to be the exact size, just make sure it's a tight but adjustable fit.

• You can use whatever emitter and driver you want, but square emitters will give a square beam.

• When removing the bezel, use some painters tape on top of the hole of the reflector to prevent dust ingress while storing it.

WARNING: this is not a toy, be responsible!