Feit Electric sells actual red LED bulbs. (Most others sell white bulbs with colored filters.) Great for nighttime use.
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The difficulty is if you want more than 3W of light (I currently use a color adjustable bulb set to red).
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I want an LED rather than fluorescent solution for orange light at the 40W-equiv level, but I haven't found blue-free so far.
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Would a diffraction grating also work?
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I bet Spirographs aren't that expensive either and they're useful for drawing dope shapes
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