Can you upgrade an old Ryobi flashlight to LED?

If your old incandescent Ryobi flashlight bulb is dead, it's actually possible in most cases to swap it out for an LED.
Gizmodo

Upgrade Your Current Flashlight to an LED Flashlight

Why throw your current flashlight away to upgrade to LED when you can keep all the good stuff and just upgrade the light itself? Milwaukee’s LED Module flashlight upgrade does just that. [ToolBarn via ...
Officer

Flashlight 220 lumen upgrade kit

The MiniStarST/XT LED flashlight upgrade from Terralux is a simple drop-in replacement, never burns out, doubles the run time and provides 220 lumens of bright LED light. OFFICER Media Group's mission ...
NBC4 Columbus

Fenix Launches TK21R and TK35R Tactical Flashlights with Major Upgrades in Brightness and Control

The new TK21R and TK35R flashlights deliver up to 5800 lumens, enhanced runtime, and faster access to full brightness with updated tail switch controls. LITTLEON, CO ...