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.
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Ryobi 18V, 40V, and 80V tools: Explained

Ultimately, the Ryobi tool platform you choose depends on your wants, needs, budget, and profession. The 18V ONE+ line is the ...