Category:Daylight efficiency of artificial illuminants (1909)
Jump to navigation
Jump to search
Media in category "Daylight efficiency of artificial illuminants (1909)"
The following 2 files are in this category, out of 2 total.
-
Daylight efficiency of artificial illuminants (1909) (14590637479).jpg 1,896 × 3,334; 813 KB
-
Daylight efficiency of artificial illuminants (1909) (14774145251).jpg 1,908 × 3,318; 782 KB