Poor lighting color rendering and flicker can have negative impacts on people’s health, such as impaired cognition and epileptic seizures. Color rendering is the ability of a light source to reveal the colors of objects faithfully in comparison to a natural light source. Poor color rendering can affect visual perception, mood, performance, and comfort1. Flicker is a rapid and repeated change in the brightness of light. Flicker can cause eye strain, headaches, fatigue, and stress2. Flicker can also impair cognitive functions, such as attention, memory, and reading comprehension3. Moreover, flicker can trigger epileptic seizures in some people who are sensitive to light, especially at certain frequencies4.

References:

LED Lighting Flicker and Potential Health Concerns: IEEE Standard PAR1789 Update

Is Poor Lighting Putting Your Workers’ Safety and Health at Risk?

5 Effects of Poor Lighting in the Workplace

Increase in LED lighting ‘risks harming human and animal health’