COLOURED FLOODLIGHT.

Auckland Star, Volume LIX, Issue 151, 28 June 1928, Page 21

COLOURED FLOODLIGHT.

WHITE BEAMS UNNECESSARY

That buildings need not be white or of light-colonred material to be floodlighted has just been demonstrated by engineers of the General Electric Company in the illumination of a group of red brick factory buildings comprising the Johnson arid Johnson plant at New Brunswick, N.J.

As red i< a poor reflector of white light, more than 100 floodlights equipped with red lenses were ti.-cd. The effect is unusual and spectacular, attracting wide attention from persons travelling on nearby highways and on the main line of the Pennsylvania Railroad between New York and Washington. When the matter of floodlighting this plant was first suggested to the General Electric Company, tests were made by W. D'A. Ryan in the illuminating engineering laboratory at Schenectady with projectors using various coloured lenses. White floodlights showed up the mortar between the bricks and other defects prominently, but when red was substituted these facts were not emphasised, and the effect was a smooth spread of light which could be seen at a considerable distance.