Just a question- does anyone know of drop in LED replacements for generic lights? Is there any standardization? I have a couple of $20 no name CR123A lights with incandescent bulbs that are just collecting dust. A drop-in LED conversion would make them usable at least.

How would I go about finding the right parts? Or am I better off just tossing them/relegating them to the junk drawer? Ultimately it's not about the $20, more about not wasting the aluminum body & reflectors.
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman