noun

lighting or light.

higher levels of illumination are needed for reading

light,lighting,radiance,gleam,glitter,brilliance,glow,glare,dazzle,flash,shimmer,shining,gleaming,glowing,irradiation,luminescence,incandescence,fluorescence,phosphorescence,illumining,irradiance,lucency,lambency,effulgence,refulgence,coruscation,fulguration