Dr. Sam Berman
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A comparison of traditional and high colour temperature lighting on the near acuity of elementary school children

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Abstract

The near visual acuity (400 mm distance) of 27 children aged 10-11 years old was measured by a licensed optometrist under two common fluorescent lamps of CCT 3600 K and 5500 K. Acuities were measured for three lighting conditions, either both lamps providing equal task luminance or a condition where the task and room luminance from the 5500 K lamps was set 50% lower. For the equal luminance condition, the results showed visual acuity was significantly better (P B/0.001) under the higher CCT lamp with 24 of 27 children having better acuity. Paired t-tests comparing the lower luminance condition showed significantly less acuity for the 5500 K lamps at the lower luminance, but no significant difference between the 3600 K lamps at the higher luminance compared with the 5500 K lamps at the lower luminance.


  1. Lawrence Berkeley National Laboratory, Berkeley, California, USA,sam.berman@gte.net
  1. M Navvab, Phd FIES

    1. College of Architecture, The University of Michigan, Ann Arbor, Michigan, USA
  1. MJ Martin, OD

    1. Bay City, Michigan, USA
  1. J Sheedy, OD Phd

    1. College of Optometry, The Ohio State University, Columbus, Ohio, USA
  1. W Tithof, Phd

    1. Bay City Public Schools, Bay City, Michigan, USA

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