Blue Light Filtering Glasses?
Blue Light Filtering Glasses?
Out of context: Reply #4
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Nairn
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https://bedtimebulb.com/
Nairn
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funny... incandescent bulbs were exactly this.
inteliboy
..but typically used an order of magnitude or two more energy to run and lasted a hundredth of the lifespan.
Nairn
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