Comparing colour discrimination and proofreading performance under compact fluorescent and halogen lamp lighting.

Area of Science:

• Lighting technology
• Human visual perception

Background:

• Legislation mandates replacement of inefficient incandescent lamps with energy-efficient alternatives like CFLs and halogen lamps.
• These alternatives possess varying spectral power distributions, leading to differences in color rendering.

Purpose of the Study:

• To compare color discrimination and proofreading performance under compact fluorescent lamps (CFLs) and halogen lighting.
• To assess the impact of illuminance levels on these tasks under different light sources.

Main Methods:

• Participants undertook the Farnsworth-Munsell 100 Hue Test for color discrimination and a proofreading task.
• Testing was conducted under CFL or halogen lighting at low (70 lx) and high (800 lx) illuminance levels.
• Correlated color temperatures of the light sources were comparable.

Main Results:

• Illuminance positively influenced both color discrimination and proofreading performance.
• Color discrimination was significantly impaired under CFL lighting compared to halogen lighting.
• Participants perceived halogen lighting as more suitable for color discrimination tasks.

Conclusions:

• Energy-efficient CFLs exhibit color-rendering deficiencies that negatively impact color discrimination.
• While illuminance is crucial for visual task performance, the light source quality is critical for color perception accuracy.