Describes light sources, materials, or optical phenomena that exhibit identical color properties. In optics, it often refers to lines or bands of the same color produced by interference, or to matching light sources that emit the exact same spectral distribution.
Heard on the job
Ensure the replacement LEDs are truly isochromatic with the existing array before sealing the fixture.
Related terms
Chromaticity
Where a light's color sits on a color map once brightness is set aside, given as coordinates such as x, y or u', v'.
Metamerism
The effect where two colors match under one light source but not under another, because their spectra differ.
CCT
Correlated Color Temperature: the warm-to-cool appearance of white light, stated in kelvin.