Holophane ball lamp

Holophane lamp ball to lay on car brake saying or to hang from the ceiling with chain of a meter. Possibility also in diameter 40. In the mid-1920s, the sa holophane played the leading roles in french public lighting the history of holophane began in paris in 1893. French engineer André Blondel, with the help of Greek engineer spiridion psaroudaki, invented the "prismatic moulded glass". This process uses the principle of light diffraction. From the mid-1920s, the sa holophano played the leading roles in french public lighting model 50cm in diameter on a metal base.