Nit
The nit (nt) equals one candela per square meter — a practical name for the same SI luminance unit used on TV and monitor specs.
Nits appear on HDR television ratings, smartphone display specs, and panel brightness marketing where cd/m² is less familiar.
Candela per Square Meter (cd/m²)
The candela per square meter (cd/m²) is the SI unit of luminance — luminous intensity emitted or reflected per unit area.
Candela per square meter quantifies display brightness, signage glare, and surface luminance in photometry and lighting codes.