Glossary · Flashlights
TIR Optic
A TIR (total internal reflection) optic is a clear molded lens that collimates an LED into a clean beam without a traditional reflector. TIRs give smooth, artifact-free beams in a short package, which is why many compact EDC lights use them.
Related terms
Reader favorites
The short list — full rankings live on the best-gear page.
Nitecore UI1 charger + 18650
$11.99
Check priceCIVIVI Elementum knife
$65.00
Check priceSureFire Stiletto Pro
$358.95
Check price
Straight disclosure —some links on this page are affiliate links. As an Amazon Associate we may earn a commission when you buy through them, at no extra cost to you. It never changes the price you pay, and it never changes a verdict.
60 guides published
42 products vetted
250 reader price checks
Featured merch
Original graphics, made to order. Gear-room aesthetics, no logos shouting.
