TM -30-15 also generates a color vector graphic that indicates average hue and chroma shifts, which helps with interpreting the values of Rf and Rg.
The average level of saturation relative to familiar (reference) illuminants. (If Rg is higher than 100, the light emission is producing an average increase in saturation; if lower, an average decrease.)
The accurate rendition of color so that they appear as they would under familiar (reference) illuminants. (0-100 scale)
The Illuminating Engineering Society of North America (IES) announces the publication of IES Method for Evaluating Light Source Color Rendition (TM-30-15).
Flicker Index assumes values from 0 to 1. Zero means steady light output. Higher values indicate an increased possibility of noticeable lamp flicker, as well as stroboscopic effect. Therefore, lower flicker index is better.
Flicker Percentage is a relative measure of the cyclic variation in output of a light source. Higher values indicate an increased possibility of noticeable lamp flicker, as well as stroboscopic effect. Therefore, lower flicker percentage is better.
According to IEEE research, obvious low flickering might cause some diseases. In generally, light flicker frequency design will be recommended higher than 100Hz, even 160Hz.
Light flicker refers to quick, repeated changes in light intensity that makes the light flutter and be unsteady.
PPFD is a value that explains how many photons in specific range(it’s from 400-700 nm for plant growth) of the visible light spectrum (photosynthetic active radiation or PAR) that fall on a square meter of target area per second. The unit is µmol/m2s.
The color variation is measured by the standard deviation of color matching (SDCM). A color difference of 1 SDCM unit is not visible, 2 to 4 units is barely visible, and 5 or more units is readily noticeable. The lower the number of SDCM, the smaller the color shift.