To study the effect of individual control of the light on thermal comfort
ID
Source
Brief title
Condition
- Other condition
Synonym
Health condition
thermal comfort and metabolic health
Research involving
Sponsors and support
Intervention
Outcome measures
Primary outcome
Difference in thermal comfort between with-control condition and no-control
condition.
Secondary outcome
- To test the hue-heat hypothesis - If the warmer light (lower CCT) can result
in a warmer temperature sensation.
- To investigate if the initial light conditions will affect the preferred
light condition (hysteresis effect).
- To investigate if CCT affects task performances and if the task performance
can be enhanced by personal control of CCT.
- To study the effect of the personal control of CCT on thermal physiological
parameters.
Background summary
In order to fulfil the demand of thermal comfort, current environmental design
practice narrows the temperature into a small range. Expanding the temperature
range offers a significant energy-saving potential and may elicit some
important health benefits. Nevertheless, expanding the temperature range may
compromise thermal comfort. Studies have shown that environmental factors can
interact with each other to a certain extent. Especially, the indoor light can
affect thermal comfort, which provides a possible mean to expand the acceptable
temperature range while providing comfort.
Study objective
To study the effect of individual control of the light on thermal comfort
Study design
This study is a within-subject experiment, which will include four lighting
conditions. Those four lighting conditions are either with personal control of
light or without personal control of light, in combination with two different
initial light settings. To balance the order of the conditions, the orders are
taken from a 4×4 Latin-square table and participants will be randomly assigned
to one of the orders. During each condition, thermal perceptions, visual
perceptions, physiological parameters, lighting control and cognitive
performance will be measured.
Intervention
Participants will be exposed to thermally and visually uncomfortable
environments either with personal control of light or without personal control
of light. When personal control of light is introduced, participants are
allowed to control their lighting environments.
Study burden and risks
This study carries no benefits for the subjects. It is not a therapeutic
research. However, the study will lead to novel insights into the effect of
personal control of light on thermal comfort and various health-related
parameters such as blood pressure, heart rate and energy expenditure. The risk
of COVID19 infection is low. The major burdens consist of recurrent study
visits, a moderate time commitment and exposure to warmer and cooler
environments than usual. Furthermore, subjects are asked to regulate their
eating and exercise habits one day before each measurement day of the study to
limit external influences on the measurement of physiological parameters. This
may be a small social and psychological burden.
Universiteitssingel 50
Maastricht 6229ER
NL
Universiteitssingel 50
Maastricht 6229ER
NL
Listed location countries
Age
Inclusion criteria
- Female on contraception and male
- Caucasian
- BMI: 18-27.5
- Age: 18-40
- Healthy
- Non-smoker
- Live in the Netherlands (or area near the Netherlands) for at least 2 months
Exclusion criteria
- Extreme chronotype
- Ocular pathologies
- Cardiovascular diseases
- Diabetes or abnormal sugar levels
- Colour blindness
- Hypertension (systolic/diastolic blood pressure >140/90)
- Hypotension (systolic/diastolic blood pressure <90/60)
- Any medical condition requiring treatment and/or medication that might
interfere with the investigated parameters.
- Presence of Raynaud*s phenomenon
- Participation in another biomedical study within 1 month prior to a screening
visit
- Jet lag or night shift work in the past 2 months
Design
Recruitment
Followed up by the following (possibly more current) registration
No registrations found.
Other (possibly less up-to-date) registrations in this register
In other registers
| Register | ID |
|---|---|
| CCMO | NL76263.068.20 |
| OMON | NL-OMON24613 |