| 摘要 |
A tunnel light lamp comprises cupola made of transparent material installed on the roof over the zenith window of house, this is connected to light guide arranged as cylindrical or as a directed down with larger base truncated cone that goes through ceiling to training, working or dwelling premises. The light guide comprises one or two strips fixed on its inner surface by logarithmic spiral that increases down with pitch. The inner surface of the light guide and one of spiral strips are made mirror, and the other one is covered with phosphor dye. |
