Aiming for good temperature and good light would take different approaches depending on the climate. Are you more at risk of cold or over-heating? Damp and mouldy or dry? Glare or gloom? Optimal quantity and orientation of windows, width of eaves, quantity and position of thermal mass, insulation, single, double or triple glazing, ventilation systems, heating, flooring and cladding materials, etc all depend on where you are.
Or nice big ones if they would get sunshine rather than streetlights, with good thermal blocking curtains for when you want to keep cold or heat or light out. :)Smaller windows in bedroom so as to let less light in.