Lighting device and method of lighting

1. A lighting device comprising at least one solid state light emitter, said lighting device, when supplied with electricity of a first wattage, emitting output light having a wall plug efficiency of at least 85 lumens per watt of said electricity.

2. A lighting device as recited in claim 1 , wherein said output light is of a brightness of at least 300 lumens.

3. A lighting device as recited in claim 1 , wherein said output light is perceived as white.

4. A lighting device as recited in claim 1 , wherein said output light has a CRI Ra of at least 90.

5. A lighting device as recited in claim 1 , wherein said solid state light emitter is a first light emitting diode.

6. A lighting device as recited in claim , wherein said lighting device further comprises at least one luminescent material.

7. A lighting device as recited in claim 1 , wherein said lighting device further comprises at least one power line, at least a first group of said light emitting diodes being directly or switchably electrically connected to said power line, a voltage drop across said first group of said light emitting diodes, and across any other components along said power line, being between 1.3 and 1.5 times a standard outlet voltage.

8. A lighting device as recited in claim 1 , wherein when said lighting device is supplied with electricity of said first wattage, a mixture of all light exiting from said lighting device which was emitted by any of said at least one solid state light emitter which emit light having a dominant wavelength which is outside the range of between 600 nm and 700 nm would have x, y color coordinates which define a point which is within an area on a 1931 CIE Chromaticity Diagram enclosed by first, second, third, fourth and fifth line segments, said first line segment connecting a first point to a second point, said second line segment connecting said second point to a third point, said third line segment connecting said third point to a fourth point, said fourth line segment connecting said fourth point to a fifth point, and said fifth line segment connecting said fifth point to said first point, said first point having x, y coordinates of 0.32, 0.40, said second point having x, y coordinates of 0.36, 0.48, said third point having x, y coordinates of 0.43, 0.45, said fourth point having x, y coordinates of 0.42, 0.42, and said fifth point having x, y coordinates of 0.36, 0.38.

9. A lighting device as recited in claim 1 , wherein said output light is perceived as warm white.

10. A lighting device as recited in claim 1 , wherein said lighting device, when supplied with electricity of a first wattage, emits output light having a wall plug efficiency in the range of from about 85 to about 113.5 lumens per watt of said electricity.

11. A lighting device as recited in claim 1 , wherein said lighting device, when supplied with electricity of a first wattage, emits output light having a wall plug efficiency of at least 110 lumens per watt of said electricity.

12. A lighting device as recited in claim 1 , wherein said lighting device, when supplied with electricity of a first wattage, emits output light having a wall plug efficiency in the range of from about 100 to about 113.5 lumens per watt of said electricity.

13. A lighting device as recited in claim 1 , wherein said electricity is AC electricity.

14. A light device as recited in claim 1 , wherein the lighting device comprises a self-ballasted lamp.

15. A lighting device as recited in claim 1 , wherein the lighting device further maintains a junction temperature of the solid state light emitter at or below a manufacturer rated junction temperature for a 25,000 hour lifetime in a 25 ° C. ambient temperature.

16. A lighting device as recited in claim 1 , wherein the lighting device comprises:

one or more strings of light emitting diodes;

a power supply for driving the one or more strings of light emitting diodes from an AC power source;

a heat sink in thermal communication with the light emitting diodes and configured to transfer heat from the light emitting diodes to an ambient environment of the lighting device; and

a diffuser optic configured to balance light transmission with diffusion to obscure the light emitting diode light sources.

17. A method of lighting, comprising supplying electricity to a lighting device comprising at least one solid state light emitter, causing the lighting device to emit light at a wall plug efficiency of at least 85 lumens per watt of said electricity.

18. A method as recited in claim 17 , wherein output light exiting from said lighting device is of a brightness of at least 300 lumens.

19. A method as recited in claim 17 , wherein output light exiting from said lighting device is perceived as white.

20. A method as recited in claim 17 , wherein output light exiting from said lighting device has a CRI Ra of at least 90.

21. A method as recited in claim 17 , wherein said lighting device has a wall plug efficiency in the range of from about 85 to about 113.5 lumens per watt of said electricity.

22. A method as recited in claim 17 , wherein said lighting device has a wall plug efficiency of at least 110 lumens per watt of said electricity.

23. A method as recited in claim 17 , wherein said power is AC electricity.

24. A method of lighting, comprising:

providing a lighting device that uses power of a first wattage;

providing at least one solid state light emitter; and

emitting light that has a wall plug efficiency of at least 85 lumens per watt of power.

25. A lighting device as recited in claim 1 , wherein said lighting device, when supplied with electricity of a first wattage, emits output light having a wall plug efficiency in the range of from about 85 to about 100 lumens per watt of said electricity.

26. A lighting device as recited in claim 1 , wherein said lighting device, when supplied with electricity of a first wattage, emits output light having a wall plug efficiency in the range of from about 85 to about 110 lumens per watt of said electricity.