illumination
preferred label: روشنایی @fa
type: Concept
related: light intensity

visible light
preferred label: نورمرئی @fa
type: Concept
related: light intensity

optics
preferred label: نورشناسی @fa
type: Concept
narrower: light intensity

luminous energy
preferred label: انرژی درخششی @fa
type: Concept
related: light intensity

light intensity
related: luminous energy
related: electric lamps
related: visible light
related: illumination
broader: optics
preferred label: شدت نور @fa
type: Concept

electric lamps
preferred label: لامپ‌های الکتریکی @fa
type: Concept
related: light intensity