Patent ID: 7938564

Claim:
A lamp having structure that provides combined first and second functional light distribution properties, comprising: an extended elongate translucent shell that allows light to pass through diffusely and enclosing a longitudinally extending interior cavity, the cavity having (a) a first portion with opposing ends having a first diameter and a second diameter in which the first diameter is greater than the second diameter, the first portion including a reflective coating on an interior surface of the shell so that light in the first portion of the cavity is directed by the reflective coating substantially longitudinally from an end of the shell; and (b) a second portion is frustroconical defined by opposing ends having the second diameter and a third diameter in which the second diameter is greater than the third diameter, said second portion lacking a reflective coating so that light in the second portion of the cavity emits diffusely in many directions from the second portion of the shell; a socket-engaging base attached to the shell at a second end and including a pair of electrical contact members for communicating with respective electrical contacts of a socket of a light fixture; and an omni-directional light source disposed within the interior cavity and in electrical communication with the electrical contact members, whereby light emitted from the light source communicates in the first portion substantially longitudinally from the end of the shell and in the second portion diffusingly in many directions through the shell.