PNNL
| Term | Term Definition | Options | Unit of Measure |
|---|---|---|---|
| Circadian Stimulus |
CS - This metric indicates how well a one-hour exposure to a light source producing a certain light level and wavelength of light stimulates the circadian system, based on its ability to suppress the hormone melatonin. It ranges from 0.1, the threshold for circadian activation, to 0.7, which represents saturation. |
View | None |
| Equivalent Melanopic Lux |
EML - The WELL Building Standard uses Equivalent Melanopic Lux (EML) as a metric for measuring the biological effects of light on humans |
View | None |
| Light source | A generic term for a manufactured light source created to produce optical radiaton. The term is also use to denote sources that radiate energy in other regions of the spectrum such as IR and UV. | View | None |
| Ratio of Melanopic to Standard Illuminance (M/P ratio) |
M/P ratio - The melanopic ratio is the ratio of the melanopic response (of the cells in the eye that help control the circadian rhythms) to the visual response |
View | None |
