Lighting system 'calms pupils and improves concentration'

Could something as simple as changing the lightbulbs, lead to a dramatic improvement in exam performance and behaviour in the classroom?

A school in Surrey has been trying out a special lighting system, which it is claimed can improve concentration or calm pupils at the touch of a button.

The BBC's Jenny Hill reports from West Ewell school in Surrey.

She spoke to Guy Blair, the school's deputy head teacher, and to Claire Philips from Philips UK.