Definition from Wiktionary, the free dictionary
- Excess light supplied beyond the amount required for a given task.
- Wasted light through illumination of an unoccupied space, creating energy wastage.
- 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.