A bright-line rule is an objective legal standard that does not allow courts to weigh other factors.

Bright line may also refer to:

Brightline, a rail system in Florida, USA Brightline West, a future rail system in the Western US Bright railway line, a defunct rail line in Australia A Spectral line Emission spectrum of a chemical or atom

See also

Bright (disambiguation) Line (disambiguation) Demarcation (disambiguation) Highlight (disambiguation)