Specifications for Filters for Low Level White Lighting on Submarines
NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
Pagination or Media Count:
Red light has been used for many years to illuminate various submarine compartments at night, because dark adaptation is then achieved more quickly when the ambient light is turned off. This one advantage of red light is offset, however, by several disadvantages. The red light is fatiguing, it makes it impossible to read color-coded charts, and, indeed, it makes it more difficult to read anything. These problems have led to the desire to substitute another ambient light for the red lighting. A long series of studies has now shown that the problems associated with red light would be alleviated, if not eliminated, by substituting white light of generally comparable brightness. These results have previously been presented. Briefly, laboratory studies have shown that, compared to red light, low level white light does not degrade either contrast sensitivity, visibility through the periscope, detection of targets on sonar CRTs, or is white light as fatiguing as red.
- Air Conditioning, Heating, Lighting and Ventilating
- Submarine Engineering