Dirty windows mean that teachers and pupils are more likely to switch on lights in classrooms. Cleaning windows and reducing clutter around windows will help to maximise daylight coming into the room and minimise the need for artificial lights. Energy Sparks recommends that school windows are washed every 6 months to maxmise natural light, and blinds are left open as much as possible.

The recommended light levels for schools are:

Corridors: 100 lux

Foyers, entrance halls, canteens: 200 lux

Libraries, sports halls, gyms, classrooms, computer rooms: 300 lux

Laboratories, kitchens: 500 lux

Technical drawing room: 750 lux

Get your pupils involved with monitoring light levels in classrooms and developing an action plan to make the most of natural light.