Are there existing daylight design standards?
BS 8206-2:2008 is the code of practice for daylighting. As it is a British Standard, it applies to the UK only and gives recommendations for daylight design in buildings, including how electric lighting can be designed when used in conjunction with daylight.
EN 17037 deals exclusively with daylight and includes other methods of calculation for design parameters that do not feature in BS 8206-2.
Some existing European Standards include daylight as a factor - for example, EN 12464-1 and EN 15193 - however, both of these also look at it in the context of electric lighting provision, and so EN 17037 is truly unique in focusing on the quantity and quality of daylight for building users.