Chrono‑Light Thermophysiology Response (CLTR) Dataset

MuSIC_IRP1-2_CLTR Synopsis The Chrono‑Light Thermophysiology Response (CLTR) dataset contains multimodal measurements from a controlled warm‑exposure experiment using a 2 × 2 factorial design that crossed light intensity (Bright vs. Dim) with time‑of‑day (Morning vs. Midday). Each participant completed four sessions, one in each lighting–time combination, while exposed to moderately warm indoor conditions (air temperature ≈ 30 °C) and a standardized summer clothing ensemble. Across sessions, we recorded continuous physiological responses (e.g., skin temperature, electrodermal activity, heart‑rate–related signals) together with environmental parameters and repeated thermal‑sensation and comfort ratings. A structured sequence of fan‑cooling and re‑warming phases was used to induce transient and steady‑state thermal loads under otherwise stable room conditions. The dataset is designed to support research on thermal comfort, thermo‑physiology, light and circadian influences, and dynamic building control strategies. Overview Aspect Details Study design 2 × 2 within‑subject factorial: Light Intensity (Bright vs. Dim) × Time‑of‑Day (Morning vs. Midday). Each participant experienced all four conditions in separate sessions. Participants 20 healthy adults (10 M / 10 F), aged 19–30 years. Participants were screened for good general health, normal sleep–wake rhythm, absence of recent jet‑lag or shift work, and acclimatization to the local summer climate. Sessions per participant 4 sessions (≈ 3 h 5 min of structured phases per session), one in each condition: BRI‑MOR, BRI‑MID, DIM‑MOR, DIM‑MID. Independent variables Light intensity: Bright vs. Dim, implemented via ceiling luminaires; Time‑of‑day: Morning (≈ 07:00–10:30) vs. Midday (≈ 14:00–17:30). Thermal environment Warm but controlled indoor climate (air temperature ≈ 30 °C) in a windowless climate chamber. Clothing was standardized summer attire (≈ 0.3 clo). Key dependent measures Physiological: continuous skin temperature, electrodermal activity, and other cardiovascular/thermal proxies. Subjective: repeated ratings of thermal sensation, comfort, acceptability, and perceived control. Behavioural: fan‑speed changes during participant‑controlled phases. Design type Within‑subject, repeated‑measures design with counterbalanced order of light–time conditions across participants. Target applications Thermal comfort modelling, adaptive and resilience‑based comfort metrics, chrono‑physiology and light, and intelligent building control policies.