one of the things to look out for is the colour temperature. most light in your home are about 3K and slightly yellow (warm white). 4K is really white (cold white) and then things get super startlingly white 6.5K which has a slight blue tinge.
the effects of super white light is that things appear brighter than what they are and its great for workshops and kitchens where you really need to see what you are doing in detail. the bad side is that its pretty hard on the eyes and brain matter.
same goes with car lights. put 6.5k light on and the first 1/2 hour its amazing. after that its so white its hard to focus long term. and if you hit snow or fog its like going blind
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