LED lamp with remote phosphor and diffuser configuration

A lighting device comprising:

• a solid state light source;
• and
• a wavelength conversion material spaced from the solid state light source, the wavelength conversion material comprising a substantially frusto-spherical shape;
• wherein said wavelength conversion material comprises a phosphor carrier with a thermal conductivity of 0.5 W/m-k or more, said phosphor carrier between said solid state light source and said wavelength conversion material.

A lighting device comprising:

• a remote wavelength conversion material, said remote wavelength conversion material comprising a phosphor carrier;
• a light source;
• and
• a remote diffuser, wherein 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 wavelength conversion material and has a peak emission outside of the viewing angle from −20° to 20°, said phosphor carrier between said light source and said remote wavelength conversion material.

A solid state lamp comprising:

• a first solid state light emitter which defines a plane that is substantially perpendicular to the radial axis of the lamp;
• an optical cavity, said first solid state light emitter within said optical cavity;
• a heat sink structure, said optical cavity within said heat sink structure;
• and
• an optical system that distributes at least 5% of the light emitted by said first solid state light emitter in a direction that is below the plane defined by the at least one solid state light emitter.

A solid state lamp, comprising:

• an light emitting diode (LED) based light source;
• a remote wavelength conversion material spaced from said LED light source, wherein said remote wavelength conversion material comprises a phosphor carrier having a thermal conductivity of 0.5 W/m-k or more;
• and
• a diffuser remote to said remote wavelength conversion material wherein said diffuser comprises a shape and light scattering properties to disperse the light from said LED light source and wavelength conversion material in a substantially omnidirectional emission pattern;
• said phosphor carrier between said LED based light source and said remote wavelength conversion material.

A solid state lamp, comprising:

• a light emitting diode (LED) based light source;
• a remote phosphor spaced from said LED light source, wherein said remote phosphor comprises a phosphor carrier having a thermal conductivity of 0.5 W/m-k or more;
• and
• a diffuser remote to said remote phosphor wherein said diffuser masks said remote phosphor when said solid state lamp is not operating;
• said phosphor carrier between said LED based light source and said remote phosphor.

A solid state lamp, comprising:

• a light emitting diode (LED) based light source;
• a three dimensional remote phosphor spaced from said LED light source;
• and
• a three dimensional diffuser remote to said remote phosphor, wherein 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 and has a peak emission outside of the viewing angle from −20° to 20°;
• wherein said remote phosphor comprises a phosphor carrier, said phosphor carrier between said LED based light source and said remote phosphor.

A solid state lamp, comprising:

• a light emitting diode (LED) based light source;
• a remote phosphor comprising a frustospherical portion, said remote phosphor spaced from said LED light source;
• and
• a diffuser comprising a frustospherical portion, said diffuser spaced from said remote phosphor;
• wherein 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 and has a peak emission outside of the viewing angle from −20° to 20°;
• wherein said remote phosphor comprises a phosphor carrier, said phosphor carrier between said LED based light source and said remote phosphor.