Standardizing Shipboard Lighting: Light Fixtures and Light Bulbs on U.S. NavyShips

摘要

The intent of this investigation was to determine if light levels variedsignificantly depending upon the light bulb/fixture configuration. Three light bulb types and four fixture designs were evaluated at the HLW (maintenance level) and LLW (night time) lighting conditions. Two results found in this study are critical to the standardization of shipboard lighting. First, light levels produced by the Daylight bulb are significantly lower than the other two bulbs for all conditions. The lower intensity and spectral characteristics (bluish-gray light) of the Daylight light bulb provide a significant disruption in an otherwise homogenous light field composed of Coolwhite or White light bulbs. Therefore, the shipboard use of the Daylight bulb should discontinued. The second recommendation would be to discontinue the use of the clear fixture lens. This lens does not provide a homogenous field of light. Use of the clear lens in the LLW condition would provide a light significantly more intense than recommended levels thus disrupting the dark adaptation process. These recommendations are made with the intent to standardize shipboard lighting to optimize human performance. Further evaluations of surface ship lighting configurations should be conducted. Ambient light, Light fixtures, Submarines. Light intensity, Light bulbs, Standardization, Surface ships.