MINIMAL RED LIGHT LEVELS ON BOARD SUBMARINES
NAVAL MEDICAL RESEARCH LAB NEW LONDON CT
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Specific limiting brightness values were determined for light sources and working surfaces for submarine compartments where red lighting is required, in order to provide adequate seeing conditions under red light with minimum interference to dark-adapted personnel. Since acuity decreases as the level of illumination is lowered, whereas dark adaptation increases, any specifications of brightness levels can be no more than a workable compromise between the two requirements. Accordingly, initial adaptation should be made under the best possible conditions, that is under the lowest feasible red illumination wherein the men can perform necessary tasks.
- Submarine Engineering