listen to the pronunciation of over-illumination
الإنجليزية - الإنجليزية
Excessive or annoying light producing glare, annoyance and adverse health effects

The building's architect failed to account for natural light availability and specified more lighting fixtures than needed, resulting in over-illumination and leading to increased headache incidence for some building occupants.

Wasted light through illumination of an unoccupied space, creating energy wastage
Excess light supplied beyond the amount required for a given task