Night Curtains are usually heavyweight or in other words they are heavy lined, opaque and are of dark coloured materials. They can block 100% light from outside and which in most cases at night, a person from outside cannot notice that lights are on inside the house. They are suitable for bedroom and lounge use especially when you want to watch a movie and you do not wish to have light destructions from outside. And also when you need to have a nap maybe in the afternoon, night curtains will serve you the best. Basically, night curtains are meant to block light from outside creating a blackout effect in your room.