Chromodynamic light
A tricorder scanning a chromodynamic light
A chromodynamic light was a type of device that used chromodynamic energy to create light that was used by the Nechani during the late 24th century.
Captain Kathryn Janeway's Nechani guide asked if the captain knew anything about how to repair chromodynamic lights in 2373. Janeway did not, but said she wouldn't mind taking a look at it. The guide then explained that "They're as fussy as tarchee cats. You tune them too high, they burn out. You tune them too low, they sputter. I've told the monks to replace them all with neodyne lights, it would save hours of repair work." (VOY: "Sacred Ground")