Green Is the Colour song was a regular part of the band's shows from early 1969 through 1970, then less common in 1971. It was played for the last time during their short tour of Japan and Australia in August 1971. The song was later played by Nick Mason's Saucerful of Secrets. with: Green Is the Colour "Green Is the Colour" is a track on Pink Floyd's 1969 "More". It was composed and written by Roger Waters and sung by David Gilmour. A tin whistle is heard in the song, played by drummer Nick Mason's then-wife Lindy. A live version of the song was
Human eye hampered by retinal disease, poor vascular circulation and high altitude exposure. The human eye can detect a luminance range of 10, or one hundred trillion (100,000,000,000,000) (about 46.5 f-stops), from 10 cd/m, or one millionth (0.000001) of a candela per square meter to 10 cd/m or one hundred million (100,000,000) candelas per square meter. This range does not include looking at the midday sun (10 cd/m) or lightning discharge. At the low end of the range is the absolute threshold of vision for a steady light across a wide field of view, about 10 cd/m2 (0.000001 candela per square meter).