Patent ID: 7057821
Filing Date: 2006-06-06
Classification: E04D,F21S,F21V,F21Y,Y10S

Abstract:
1. A natural and artificial lighting system comprising: a light shaft adapted to receive natural light having a top and bottom open end; a top diffuser placed on the top open end of said light shaft; a bottom diffuser placed on the bottom open end of said light shaft; a source of artificial light placed between said top diffuser and said bottom diffuser; a rechargeable energy source coupled to said source of artificial light; a photovoltaic cell positioned to receive natural light and coupled to said rechargeable energy source; and a controller coupled to said source of artificial light and said rechargeable energy source, said controller controlling operation of said source of artificial light, whereby the natural light and artificial light system is capable of operating independently of any external electrical power supply.