laugh In addition to a few Fenix and 4Sevens AA LED flashlights I have a couple of those old crummy Maglight flashlights that I upgraded with an aftermarket LED bulb, complete with the TerraLUX LED Light Engine (voltage reg circuitry?). Three D cells does a nice job pushing a 3 Watt LED. Add the Maglite reflector and you've got a fairly robust light. ymmv
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Better is the Enemy of Good Enough.
Okay, what’s your point??