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

The aurora of the southern hemisphere.

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

(Judaism) Hanukkah. / (Hinduism) Divali. / (Myanmar) The Thadingyut Festival.

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.