overillumination

Noun

 * 1) Excess light supplied beyond the amount required for a given task.
 * 2) Wasted light through illumination of an unoccupied space, creating energy wastage.
 * 3) 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.