Patent ID: 7726836

Claim:
A lighting apparatus for replacement of a conventional incandescent light bulb, said lighting apparatus comprising: an arrangement of a plurality of interconnecting printed circuit boards (PCBs) forming a three dimensional light bulb shape round sculpture; each said PCB being a plane of a predetermined thickness wherein shapes of the planes of the PCBs selected from similar shapes and different shapes; said three-dimensional light bulb shape comprising a first portion sized to be fitted into an Edison-type light bulb socket; at least three of the said edges of said plurality of interconnecting PCBs at said first portion being butted against an inner side wall of a conventional incandescent light bulb socket when said PCBs are connected to one another; at least one PCB tip edge at said first portion protruding from an electrical contacting foot of said bulb socket when said at least three PCBs are connected to one another; said three-dimensional light bulb shape comprising a second portion in the round sculpture which is equivalent to a glass bulb part of said conventional light bulb; said second portion serving for enveloping light emitting elements mounted on surfaces of said PCBs, and are connected to circuit-laid on said PCBs; and wherein each of said side edges has at least one bump; the bumps on all said side edges are arranged so their outlines align with sectional lines at said inner side wall as the light apparatus is fully screwed into the socket.