The legibility of various sized letters was evaluated under Aviation Red, 'Lunar', and Neutrally-Filtered Incandescent White lighting using a simulated instrument panel. Seven brightness levels were employed: 0.005, 0.01, 0.05, 0.10, 0.15, 0.19 FT-L, and the maximum brightnesses obtained at the rated voltage of the lamps. Legibility was significantly better under Aviation Red than either of the 'white' systems. There was no significant differences between the 'white' systems. Increases in performance were found above brightness levels previously reported. It is recommended that work be continued on legibility under various types of lighting using different test material. (Author)
Legibility of Various Sized Letters under Aviation Red, Lunar, and Neutrally-Filtered Incandescent White Lighting Systems
1967
41 pages
Report
Keine Angabe
Englisch
Incandescent lamps for aviation service
Engineering Index Backfile | 1929
Railway carriage lighting by incandescent gas
Engineering Index Backfile | 1903
Incandescent gas lighting for railway cars
Engineering Index Backfile | 1903
|The Incandescent Lamp for Automotive Lighting
SAE Technical Papers | 1929
|Incandescent gas lighting for passenger cars
Engineering Index Backfile | 1906
|