Glossary
Full Spectrum
Full-spectrum (most commonly used): refers to a spectrum that covers the entire wavelength range.
PPF
Photosynthetic photon flux (PPF) is a physical quantity that measures how many photons a light source emits per second within the effective wavelength range for photosynthesis (400-700 nanometers), with the unit being micromoles per second (μmol/s). In simple terms, it tells you how much “usable light” this light source can provide to plants.
PPFD(Photosynthetic Photon Flux Density)
Photosynthetic photon flux density (PPFD) is defined as the instantaneous measurement of the amount of photons in the photosynthetically active radiation (400–700 nm) that reaches a surface area per unit time, quantified in micromoles per square meter per second (μmol/ m²s)
CRI（Color Rendering Index)
Color Rendering Index (CRI) is a way to measure a light source’s distinctive attributes. It is an assessment of how the light source shows object colors “naturally” when compared to a familiar basis of reference, either incandescent light or daylight.