Any industry that does not require high capitalization or heavy machinery.

Alternative spelling of lighthearted

(physics): In special relativity, the pattern describing the temporal evolution of a flash of light in Minkowski spacetime. This is modeled in 3-space using the two horizontal axes as spatial dimensions, while the vertical axis is time.

(photography) An exposure meter / Any of various devices that measure some property of light

(dated) A display of coloured lights that move in shifting patterns.

Alternative form of stoplight

An intense carbon arc lamp used in cinematography

(automotive, slang) Any warning light or indicator on the dashboard of a car, designed to alert the driver to problems, such as the parking brake being on or the oil being low.

limelight

limelight