LED lamp or bulb with remote phosphor and diffuser configuration with enhanced scattering properties

A solid state lamp, comprising:

• a forward emitting light emitting diode (LED) based light source;
• a substantially flat remote phosphor carrier spaced from said LED light source;
• a diffuser distinct from said remote phosphor carrier, said diffuser comprising a scattering material and comprising a geometry configured to disperse light from said LED light source and said phosphor carrier in a substantially uniform lamp emission pattern of light, wherein said diffuser geometry comprises a neck at its base, wherein at least a portion of said phosphor carrier is at the base of said diffuser.

A solid state lamp, comprising:

• a light emitting diode (LED) based light source;
• a three dimensional remote phosphor carrier comprising a neck and spaced from said LED light source;
• a three dimensional diffuser distinct from said remote phosphor carrier and having a shape and varying scattering properties configured such that light emitted from the diffuser has reduced variation in spatial emission intensity profile over an angular range compared to the light emitted from the remote phosphor carrier, wherein said diffuser comprises a neck, wherein at least a portion of said remote phosphor carrier is at the base of said diffuser.