plural of light bulb

An excess of artificial light, especially near urban areas, reducing visibility of stars, etc. in the night sky.

One of a race of elves who live above ground and are radiant. / (Norse mythology) A daylight dwelling elf or nature spirit (as opposed to the underground dwelling dark elves or dwarves).

(physics) Light of a uniform wavelength and phase; as used in lasers

Alternative spelling of tealight

Alternative spelling of traffic light

(US) A traffic light, between the green light and the red light, indicating that vehicles may proceed with caution. / (idiomatic) Hesitance to proceed; limited approval or permission to proceed.

Alternative spelling of greenlight

(figuratively) A way of presenting or perceiving something such that it appears more favourably than by an alternative presentation or perception.

A bright blue flare prepared from nitre, sulphur, and the black sulphide of antimony; formerly used in signalling, but now chiefly as fireworks.