A reduction of light, especially during wartime or emergencies to avoid detection.

प्रकाश में कमी

English Usage: During the blackout, a dimout was enforced to prevent enemy attacks.

Hindi Usage: ब्लैकआउट के दौरान, दुश्मन के हमलों से बचने के लिए प्रकाश में कमी लागू की गई।