Indoor lighting significantly shapes users’ emotional experiences, yet the impact of different correlated colour temperature (CCT), illuminance and lamp shade colour on occupants’ emotional and physiological responses have not been collectively explored. This study examines the effect of ten luminaire lamp shade colours under varying CCT (3000 K, 4000 K, 6500 K) and illuminance (150 lx, 250 lx, 500 lx) conditions on users’ emotional states and brain activity. With a light source illumination of 250 lx and a CCT of 3000 K, the yellow luminaire made the participants feel more relaxed, whereas the green illumination made them feel more nervous. The results of the electroencephalogram (EEG) showed that there were obvious event-related potential components in all three types of brain regions. The correlation between user emotion and luminaire colour was established based on Gaussian Naive Bayes, and the receiver operating characteristic curve verifies that the model is reliable. While EEG data offer valuable insights into the correlation between user emotion and luminaire colour, the findings are limited to the tested CCT and illuminance conditions. Future studies should explore a wider range of lighting parameters and real-world scenarios.
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