for Autumn and winter. Because I did not have a say in the design of my windows which are standard size, and found in many new build apartments and homes. What is the appropriate size for windows? or should I say how small can the windows be while still achieving adequate daylight? My own windows are letting in light about one fourth or even one fifth of its area. In my own apartment we have a uncomfortable contrast of glare near the window and gloom away from it. From my own observation we have two windows in the main living area, but lose light from one window as other buildings affect natural sun light. Average daylight factor calculation:  My apartment has a two side windows Day light factor % = MWRT / A (1- R2), where W= total glazed area of windows or roof lights A = total area of all the room surfaces (ceiling, floor, walls and windows) R -- area -- weighted average reflectance of the room surfaces M = a correction factor for dirt T= glass transmission factor R = angle of visible sky. We are currently working with Hampshire Light the art of lighting. Hampshire lighting offer a bespoke design service, combining innovation and design input with technical skills and integrity. Sophie motivation is to bring Sustainable Ecological Planning into main stream planning system and to continue working on designs and plan communities that are vibrant, healthy and safe, and which reflect respect for the local