Join Date: Nov 2003
Location: Alaska, Skeena, Bulkley
Sun emits a very broad spectrum of UV light : hight energy 100-250 nm , is fully absorbed by atmosphere,( mostly ozone which is broken into O2 and O, which further recombinsd into O2) . Mid range UV 280-320 nm is mostly absorbed as it passes via atmosphere, but some hits the earth. And finally longer range UV 320-400 nm, low energy called black UV, which mostly passed via atmosphere.
As for fishing, having fluorescence dye in a material may be far more important.
A fluorescence material absorbs long wave UV which hits the earth ( 300-400 nm ) and also blue light430-480 nm) ( part of visible spectrum ) and emits various colors ( depending on fluorescent material ) orange, pink, green etc.
In low visibility water 12-24", even a small amount ( specially in sunny days) of visible light conaining long wave UV and blue, will simply enhances orange, pink, or green colors.
This is why certain materials looks much brighter.
Look at fluorescent pink and non-fluorescence , material ( fly tube, cone head or hair) at daybreak. The difference is very noticeable. !!!!!!!!!
It is very important that material absorbs not only long UV , but also blue which is a much larger component of the visible spectrum.