leading light

amber light

Hesitance to proceed; limited approval or permission to proceed.

blind leading the blind

A situation in which an unqualified person is attempting to guide, advise, or train others.

bring to light

To expose, disclose or reveal something that was hidden or unknown.

come to light

To become known; to be revealed.

false light

A point of view resulting in a misleading or inaccurate representation of a person, situation, or fact.

give a light

To care.

green light

Approval, or permission to proceed.

hide one's light under a bushel

To conceal one's positive qualities or talents, especially due to modesty or shyness; to avoid attention.