Læste lige disse artikler. Meget interessante!
http://www.advancedaquarist.com/2002/2/aafeature
http://www.advancedaquarist.com/2013/12/lighting
Derudover er UV jo lidt oppe i tiden.
Hermed lidt om forskellighederne:
God kommende påske
All light is not the same – Spectrums
Light is made up of a variety of wavelengths (measured in nanometers, nm)
that translate into different hues (colors) and hence the term spectrum. The
sun produces 3 wavelengths of light:
■UVA: The visible wavelength of light and essential to photosynthesis. Actinic light is a particular portion of this spectrum (420nm) important to marine organisms. Red, orange and yellow light colors are referred to as warm; green and blues are referred to as cooler colors.
■UVB: This is the non-visible wavelength of lighting. It is what gives us a suntan.
■UVC: This wavelength is used for ultraviolet sterilizers which kill harmful
bacteria. This wavelength is very dangerous to all animals.
The different lengths of light waves do not penetrate through the water equally. Red light is the first to be filtered out and can only penetrate a short distance. Next lost are orange and yellow as light waves penetrate deeper. Greens and then blues will penetrate the water deeper, providing essential energy sources to the algae hosted in coral. Of all the colors of the spectrum blue light penetrates the deepest. And there is a slight difference in penetration between salt and fresh water with saltwater absorbing slightly more energy due to its higher density.
