Question

why coularation changes in light

Answer 1

The spectrum of light that corals receive will alter their appearance in the aquarium. Certain colors, such as fluorescent red or orange, that are not visible in daylight become very apparent under actinic lighting. Mixes of bulbs with different spectrums, along with different lighting systems, will produce varying effects on the colors of the same or similar corals. A typical lighting system for a reef aquarium will provide lighting that contains a mixture of approximately 50% white and 50% blue actinic lighting. This mixture of lighting provides the wavelengths of light that will bring out the fluorescent colors, as well as the spectrum that makes the aquarium appear natural in color.

Answer 2

light travel in a straight line