Some retail shops now are aiming to achieve a green building certification. This certification is either from LEED or BREEAM. Other local green building standards exists in some countries.
Energy efficiency is the main concern of sustainability. Make sure you check the maximum LPD (Lighting Power Density) for retail shops.
A project will be recognized for its sustainability, which means the project uses products and materials responsively manufactured and imported to the site.
The comfort and the health of the people working on this project will not be affected.
Good lighting will not create head-aches, but will enhance the movement and feeling both the sales staff and customers.
The project saves energy and uses efficient luminaires for lighting and other factors concerned with taking good care of other environment.