The effect of lighting colour and intensity on thermal comfort, physiology & alertness
- Conditions
- verkrijgen van inzicht in de interactie tussen licht, thermisch comfort, fysiologische respons en alertheid van mensennvt
- Registration Number
- NL-OMON44432
- Lead Sponsor
- niversiteit Maastricht
- Brief Summary
Not available
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Completed
- Sex
- Not specified
- Target Recruitment
- 63
• Caucasian volunteers
• Generally healthy
• Age: 18 to 30 years
• BMI: 18-25 kg/m2
• Using Microgynon 30 or levonorgestrel/ehinylestradiol
• Normal chronotype
• Colour blindness
• Ocular pathologies
• Medication use
• Pregnancy
• Hypertension (systolic/diastolic blood pressure >140/90)
• Hypotension (systolic/diastolic blood pressure <90/60)
• General feeling of illness at day of experiment
• (History of) cardiovascular diseases
• Contraindications of the telemetric pill:
o In the presence of any known or suspected obstructive disease of the gastrointestinal tract, including but not limited to diverticulitis and inflammatory bowel disease
o A history of disorders or impairment of the gag reflex
o Previous gastrointestinal surgery
o Hypo motility disorders of the gastrointestinal tract including but not limited to Illeus
• Participants that do not want to be informed about accidental medical findings, which might occur during the study. If participants do not agree that they will be informed about unexpected medical findings, they cannot participate in the study.
• Employees of the research group *Thermu* are excluded from participation.
Study & Design
- Study Type
- Interventional
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method <p>Experiment 1<br /><br>The primary objective of the first experiment is to obtain insight in the<br /><br>effect of the lighting intensity (experiment 1a) and the spectral composition<br /><br>of lighting (experiment 1b) on thermal comfort and sensation, whole body energy<br /><br>expenditure and alertness. This effect will be tested under thermo neutral,<br /><br>mild cold and mild warm conditions.<br /><br><br /><br>Experiment 2<br /><br>The primary objective of the second experiment is to obtain insight in the<br /><br>effect of the lighting intensity and the spectral composition of lighting on<br /><br>thermal comfort and sensation, whole body energy expenditure and alertness in<br /><br>an office set up. </p><br>
- Secondary Outcome Measures
Name Time Method <p>Experiment 1:<br /><br>The secondary objective of the first experiment is to study the effects of<br /><br>lighting intensity (experiment 1a) and colour temperature (experiment 1b) on<br /><br>visual comfort, thermo physiology (skin- and core temperature and blood<br /><br>perfusion) and cardiovascular parameters under different thermal conditions.<br /><br><br /><br>Experiment 2:<br /><br>The secondary objective of the second experiment is to study whether the<br /><br>effects of dynamic LED lighting on visual comfort, thermo physiology (skin- and<br /><br>core temperature and blood perfusion) and cardiovascular parameters, are also<br /><br>applicable in a laboratory controlled office setting. Because the effects of<br /><br>LED lighting in office setting may depend on the time of the day the effect of<br /><br>light intensity will separately be tested under more standardized conditions<br /><br>during the morning and evening.</p><br>