Hi to all.

I am calculating the lighting power density for the retail areas in a mall. In my case, the display area is not defined. There are a large number of tenant spaces. I am confused whether these tenants must comply with the lighting power allowance for retail according to ASHRAE 90.1 section 9.6.2, since this is not a mandatory provision.

Do you know if this should be included in the tenants lease agreement? in which case this has to be calculated? do I have to consider the display lighting in my energy model when I don't know the type of retail product?