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I'd try to correct this with cinematic gels - sheets of tinted plastic used to correct cinematic lighting. You don't need to buy a variety - you can stack up multiple layers. It may just be too darn bright. After 40 years of seeing tiny red LED indicators, one thinks LEDs struggle to make a paltry amount of light. Not at all. They can be extremely ...
Granular activated carbon can remove radon from water. As to that specific filter, you would need to check with the manufacturer or consult the packaging/instructions. http://extension.psu.edu/natural-resources/water/drinking-water/water-testing/pollutants/reducing-radon-in-drinking-water
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