The effect of lighting colour and intensity on thermal comfort, physiology & alertness

The effect of lighting colour and intensity on thermal comfort, physiology & alertness - Light, thermal comfort, physiology & alertness

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

NL-OMON

Registry ID

NL-OMON44432

Enrollment

Registered

2014-08-04

Start date

2015-01-25

Completion date

Unknown

Last updated

2025-03-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

verkrijgen van inzicht in de interactie tussen licht, thermisch comfort, fysiologische respons en alertheid van mensen nvt

Interventions

Experiment 1a: Exposure to a low light intensity (5 lux) and a high lighting intensity (1200 lux), under mild cold, neutral and mild warm temperatures. Experiment 1b: Exposure to a low colour temp

Eligibility

Age

18 Years to 99 Years

Inclusion criteria

Inclusion criteria: • Caucasian volunteers • Generally healthy • Age: 18 to 30 years • BMI: 18-25 kg/m2 • Using Microgynon 30 or levonorgestrel/ehinylestradiol • Normal chronotype

Exclusion criteria

Exclusion criteria: • Colour blindness • Ocular pathologies • Medication use • Pregnancy • Hypertension (systolic/diastolic blood pressure >140/90) • Hypotension (systolic/diastolic blood pressure

Design outcomes

Primary

Measure	Time frame
Experiment 1 The primary objective of the first experiment is to obtain insight in the effect of the lighting intensity (experiment 1a) and the spectral composition of lighting (experiment 1b) on thermal comfort and sensation, whole body energy expenditure and alertness. This effect will be tested under thermo neutral, mild cold and mild warm conditions. Experiment 2 The primary objective of the second experiment is to obtain insight in the effect of the lighting intensity and the spectral composition of lighting on thermal comfort and sensation, whole body energy expenditure and alertness in an office set up.	—

Measure

Time frame

Experiment 1 The primary objective of the first experiment is to obtain insight in the effect of the lighting intensity (experiment 1a) and the spectral composition of lighting (experiment 1b) on thermal comfort and sensation, whole body energy expenditure and alertness. This effect will be tested under thermo neutral, mild cold and mild warm conditions. Experiment 2 The primary objective of the second experiment is to obtain insight in the effect of the lighting intensity and the spectral composition of lighting on thermal comfort and sensation, whole body energy expenditure and alertness in an office set up.

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Secondary

Measure	Time frame
Experiment 1: The secondary objective of the first experiment is to study the effects of lighting intensity (experiment 1a) and colour temperature (experiment 1b) on visual comfort, thermo physiology (skin- and core temperature and blood perfusion) and cardiovascular parameters under different thermal conditions. Experiment 2: The secondary objective of the second experiment is to study whether the effects of dynamic LED lighting on visual comfort, thermo physiology (skin- and core temperature and blood perfusion) and cardiovascular parameters, are also applicable in a laboratory controlled office setting. Because the effects of LED lighting in office setting may depend on the time of the day the effect of light intensity will separately be tested under more standardized conditions during the morning and evening.	—

Measure

Time frame

Experiment 1: The secondary objective of the first experiment is to study the effects of lighting intensity (experiment 1a) and colour temperature (experiment 1b) on visual comfort, thermo physiology (skin- and core temperature and blood perfusion) and cardiovascular parameters under different thermal conditions. Experiment 2: The secondary objective of the second experiment is to study whether the effects of dynamic LED lighting on visual comfort, thermo physiology (skin- and core temperature and blood perfusion) and cardiovascular parameters, are also applicable in a laboratory controlled office setting. Because the effects of LED lighting in office setting may depend on the time of the day the effect of light intensity will separately be tested under more standardized conditions during the morning and evening.

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Countries

Netherlands

Outcome results

None listed

Source: NL-OMON (via WHO ICTRP)