is defined as the pollution resulting from the excessive and unwanted use of light. When light is abundant in areas where it shouldn’t be, such as gardens and windows, it results from a lack of visual control. Light beams should be carefully directed exactly where they are needed on the building facade, highlighting the architectural details to be emphasized, while preventing unnecessary light spread into the sky or neighboring areas. The most important elements in combating light pollution are the use of accessories such as louvers, lenses, and snoots to provide more control.-