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    Runtime for a variable-input bulb

    I have a Dorcy 41-1642 PR LED bulb, which is currently placed in a 2-D flashlight. Here is a scan of the bulb's packaging, stating its output and current consumption for different voltages. I also have an equally suitable 3-D flashlight currently using a PR Krypton bulb. My question is, and...
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    Flashlights i would like to see in production..

    I had always wondered why I never saw AA-powered lights with the cells placed beside each other (i.e., parallel, and not one on top of the other). After reading the first two posts, I realized how varying designs can have different costs to produce. ... I still want one, of course!
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