| Abstract | Temporal light modulation, (TLM) of lighting systems is known to affect human visual perception, neurobiology, and performance. This experiment measured Stroop cognitive performance, reading performance, eye movements, discomfort, and phantom array perception during exposure to each of nine TLM conditions chosen to contrast conditions varying in TLM frequency, modulation depth, or duty cycle and based on predictions drawn from the IEEE S1789-2015 recommendations. Data from 50 adult participants aged 18-65 revealed small effects mostly in predicted directions. The results support the recommendation that lower modulation depths are preferable over higher, and add to our knowledge by showing that duty cycle could also influence outcomes and that the phantom array can be detected under photopic conditions. This underlies the importance of taking a lighting systems approach to studying TLM and considering a range of effects. Future research should increase statistical power by increasing task difficulty, and duration of exposure. More naturalistic viewing conditions, such as a greater range of eye and head motion, would improve the generalizability of the work. |
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