light
A pane of glass, as in a window light, or the whole sash, as in a skylight. Photo from York, Pennsylvania, 2019. 2. Electromagnetic radiation that the unaided human eye can perceive, having a wavelength in the range from about 370 to 800 nm and propagating at a speed of 186,281 mi/sec (299,972 km/sec). (Baker, 1994)
lights