I know Lisbon well but would like to comment with a different perspective.This must be in English for me.The light must come from the expanse of the river plus the calçada pavements.However Ilike a certain melancoly at times and this comes with seasonal variety which threatens Lisbon if climate change is to cause more monotonous dry winters with no nuance or changes of light.Alsoin reference to one comment - Idon't wish to always need sunglasses