Occupant comfort and physiology under varying office lighting and thermal conditions

This longitudinal experimental dataset combines physiological, environmental, and self-reported data from 19 participants, collected between February and October 2024. Each participant performed their usual computer work in an office for five consecutive working days under systematically varied lighting and thermal conditions. The four main sessions of the office experiment took place between 8:50 and 15:15 each day. Participants first spent one day under neutral lighting and thermal conditions, followed by four days of main experimental sessions, consisting of combinations of two thermal conditions, two illuminance levels, and two spectral power distributions (SPDs).

Physiological measurements include skin temperature, heart rate, electrodermal activity, pupil size, acceleration, sleep metrics, and cortisol and melatonin concentrations. Subjective responses cover thermal, visual, and air-quality comfort, as well as sleepiness and general mental state. The indoor environment is characterized by air temperature, relative humidity, photopic and α-opic illuminance in the participant’s gaze direction, illuminance at two additional locations, and concentrations of volatile organic compounds (VOCs), CO₂, and particulate matter (PM1.0, PM2.5, and PM10).

All data are aligned to a common 1-minute time grid. Some measurements span all five days, including periods when participants were not in the office. Indicator columns allow users to isolate the office sessions and select specific combinations of experimental conditions.