DOI: 10.5281/zenodo.17817174
title: Chrono‑Light Thermophysiology Response (CLTR) Dataset
title: MuSIC_IRP1-2_CLTR

description: Synopsis

The Chrono-Light Thermophysiology Response (CLTR) dataset provides a synchronized, multimodal record of indoor environmental exposure, thermophysiological responses, behavioral adaptation (fan use), and protocol annotations collected in a repeated-measures laboratory study conducted under warm indoor conditions. The dataset is intended to support research in indoor environmental quality, human thermophysiology, personal comfort systems (e.g., fan use), and multimodal time-series modeling.

Each participant completed four sessions, defined by two orthogonal factors:



Illuminance level: bright vs. dim

Time of day: morning vs. midday


Each session follows the same protocol structure:



Block 0 (B0): 40-minute acclimation/adaptation

Blocks 1–3 (B1–B3): three sequential warm-exposure blocks with repeated fan-cooling and re-warming phases


Within Blocks 1–3, participants experience a systematic sequence of fan cooling, passive re-warming, fan-free control, and steady-state periods, enabling isolation of the effects of thermal/visual conditions on physiological and perceptual responses.

The dataset release includes:



Session metadata and de-identified participant descriptors

An authoritative minute-resolved protocol timeline (Blocks 0–3) with absolute timestamps

Minute-aligned tables for indoor environment, fan behavior, skin temperature, and questionnaire events

High-frequency wearable physiology (Empatica Embrace Plus) filtered to session time windows

High-frequency laboratory physiology (BIOPAC / BioNomadix) exported as raw, analysis-ready time series with a channel dictionary

Outdoor meteorology (5-minute resolution) for contextual analyses during the experimental period








 





 Dataset summary




Category
Details and parameters




Experimental design
2×2 factorial design crossing Time of Day (Morning: 07:00; Midday: 14:00) and Light Intensity (Bright vs. Dim).


Participants
20 healthy adults (10 M / 10 F), aged 19–30 years.; BMI 18.5–24.9 kg/m2.


Sessions(per participant)
4 sessions (≈ 185 min of structured phases per session), one in each condition: BRI‑MOR, BRI‑MID, DIM‑MOR, DIM‑MID.


Light modalities
Bright: Vertical EDI ≈299 lx; Dim: Vertical EDI ≈39 lx (emulated D93 spectrum).


Thermal environment
Warm but controlled indoor climate (air temperature ≈ 30 °C) in a windowless climate chamber.


Block 0Adaptation
40-min phase: dark adaptation (EDI ≈5.57 lx) and thermal stabilization.


Block 1 & 2Repeated blocks
55 min each: fan-at-constant-speed (5 min), skin-rewarming (10 min), fan-free-control (10 min), steady-state (30 min).


Block 3Final block
35 min: same sequence as Blocks 1 & 2, but with a shortened 10-min steady-state.


Environmental Data
Indoor environmental data sampled at 1 Hz resolution using the instrumented columns and tabletop setup. Outdoor meteorology variables are provided on a 5-minute grid for contextual analyses.


Physiological data
Laboratory-grade skin temperature (multi-site), high-frequency laboratory physiology (BIOPAC), and wearable monitoring (Empatica)


Subjective data
7-point scales for thermal sensation, comfort, pleasure, and preference.


Behavioral data
Fan speed adjustment quantified via current drawn by the fan during fan-free-control periods.


Activity/clothing
Sedentary desk work (1.1 met); standardized summer clothing (0.3 clo).




 

NOTE: To obtain the dataset, please contact the corresponding author via the Zenodo request form. Collaboration inquiries are also welcome—feel free to indicate your interest and proposed contribution when you submit the request.