These lamps are cheap, but they are good for the price. The lamps are not very strong. Pointing them towards walls in a somewhat 45 degree angle half a meter close to the wall, give good light for the first 1,5 meters, then the color fades away as you look up, until you see the ceiling where much of the color again. With four lamps they still give lots of atmosphere to a 10x5 meter room. They are great for the price and give atmosphere both to rooms and stages, but they will not rock you. Also great for decorating with placing them inside transparent boxes and stuff for making a cool stage.