Ian Random

 I always noticed that I feel better under a tree, but never could figure out why. Appears that a minimum 0.5 mm natural plant fiber blocks bad light. The fiber can be anything from cardboard to cotton. Two t-shirts are that thick which explains my improvement during the winter with thick clothes. Also 20 oz canvas is 1.00 mm and I'm exploring using it for blocking hot spots in the house. 

 After many years, it appears that metal transfer reflects an unbearable light. Anything hard that contacts metal rubs off microscopic metal particles that oxidize after a day and reflect the "bad" light. Over the last year I've been using a microfiber cloth to slowly wipe down everything like hard plastic pet carriers, laundry buckets, tools, fasteners, bed frames and even metal show curtain rings. Problem is that you can't see it, so you easily lose track until the directional pressure headaches manifest.