leon-1 said:
Yes some animals are more likely to see UV, but humans see UV as well.
Green is the brightest light in nature as far as I am aware, at night when the more interesting beasties are out and the chances are there will be very little green light unless you are using night veiwing aids and UV is limited to night clubs
I think Leon 1 youu should have a look at the link that I posted and read it through. Humans can't see UV light under normal conditions, it is outside of our visible spectrum. Humans have a UV filter in the eye that blocks out light below 500 nanometres. We only see the effects of UV when viewed using a special light source or visual aids
To quote the report - "In low light and darkness, animals see in black and white and are tens of thousands of times more sensitive to ultraviolet and blue wavelengths than humans. After all, animals can run through the woods at night without bumping into trees ."
Ultraviolet brighteners that are used in some detergents (and are also put into cloth during its manufacture) gather energy from light over a wide range of wavelengths and reradiate that energy in a very powerful narrow band that corresponds almost exactly with the peak of sensitivity of part of the deers blue cones and their more numerous rods in their eyes. This results in an unnaturally bright blue or white glow, brighter than the blue sky, or white snow. In other words some animals have their own built in night vision goggles!
As far as IR is concerned that is at the opposite end of the light spectrum and again is not visible to humans (or animals as far as I'm aware). Again we can only see the effects of IR using special technology.
I think the point we humans have to remember is not to be so arrogant. Although humans see something in a certain way the rest of the animal kingdom may not.
Why am I interested in this? Well I want to improve my ability to spot animals before they spot me and to remain unobserved. The main reason though is....I'm red / green colourblind!!
As far as their special soap is concerned it as basically a soap formulated without brighteners. I think that Nikwax and other manufacturers do similar products.
And no I don't have any mirrors in my house