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| Name | Class |
|---|---|
| Seoul Semiconductor | UNKNOWN |
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The purpose of this study is to examine, in healthy controls, whether LED lighting that has a color spectrum similar to that of sunlight is able to differentially impact mood, circadian rhythms, sleep, and behavior, as compared to standard fluorescent lighting.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| LED - Sunlike | Experimental | LED lighting with spectral pattern similar to that of sunlight |
|
| Fluorescent | Active Comparator | Fluorescent light at same illuminance (lux) as LED light |
|
| Dim | Placebo Comparator | Dim fluorescent light with same spectrum as "Fluorescent" condition |
|
| LED | Active Comparator | Standard LED lighting |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Light | Device | 15 hours of light exposure |
|
| Measure | Description | Time Frame |
|---|---|---|
| Alertness | Change in median reaction time score on the auditory psychomotor vigilance test | 15 hours |
| Melatonin suppression | Amount of reduction in the concentration of salivary melatonin concentrations during an experimental light stimulus | 3 hours |
| Measure | Description | Time Frame |
|---|---|---|
| Mood | Change in total positive and negative affect scores on the Positive and Negative Affect Schedule (PANAS) | 15 hours |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| VA Palo Alto Health Care System | Palo Alto | California | 94304 | United States |
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| ID | Term |
|---|---|
| D021081 | Chronobiology Disorders |
| ID | Term |
|---|---|
| D009422 | Nervous System Diseases |
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| ID | Term |
|---|---|
| D014467 | Ultraviolet Therapy |
| ID | Term |
|---|---|
| D010789 | Phototherapy |
| D013812 | Therapeutics |
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Participants will be aware that the lighting conditions will vary during their visits, but will not be aware of the nature of the difference in the lights.