Cornell University Ergonomics Web
Office lighting: Comparative studies of Direct and Indirect Lighting Systems
Summary report of the research study.
Hedge, A., Sims, W.R. and Becker, F.D. (1995) The effects of
lensed-indirect uplighting and parabolic downlighting on the satisfaction and visual health of office workers, Ergonomics, 38, 260-280. ABSTRACT
Images from the research study.
Prismatic lighting system in offices at the start of the study.
Parabolic lighting installed in half of the office space.
Lensed-indirect lighting installed in half of the office space.