I recently got one of these Olight Arkfeld Pro flashlights. I absolutely love the light, but the lens is not glass so I was worried about my keys scratching it. I made this cap to interferance fit over the end. I printed this with this dual color BambuLab silk filament. It's pretty close to the orange color and it makes a nice red color diffuser for using the light at night time. Takes under 5g of filament and prints in under 15 minutes.

Note: I would make sure that the light is in lockout if this cap is on as to not accidentally turn on turbo mode and either melt it or overheat the lamp. Only use the low settings on the light if you are going to use it as a night time diffuser…which you should be doing anyway. PLA Silk Dual Color Filament with spool / 1 kg / Gilded Rose (Pink-Gold) (bambulab.com)