An interesting article from our friends at Arup. 

The US have led the way in developing an accreditation for this staff focussed work environments, using the WELL BUILDING STANDARD®. While not all projects have the budget to pass all seven of the required elements to achieve complete compliance with the scheme, any improvements that can be made in these areas would be beneficial.

We feel that a staff focussed lighting scheme is critical in achieving this human centric workplace and is actually one of the seven elements required within the scheme.

The use of natural daylight where ever possible is key to achieving this and the integration between artificial and natural lighting is an an absolute must in maintaining the well being of staff and users of all buildings.