21/01/2010 10:17
Why aren't spotlights with a cold light used to prevent the growth of algae and moss?

Cold light, without any colours of the spectrum, does not enable an exact chromatic perception and therefore the beauty of the underground cannot be fully appreciated. To prevent the growth of  greenery, in the Wind Cave, exposure to rays of light has been limited by dividing the lighting into 15 sections, and by applying sensors of infra-red rays to to the lights so as they remain on only for the time to let groups pass.