Lamp with led array

A lamp comprising:

• an optically transmissive enclosure;
• a array of LEDs disposed in the enclosure;
• and
• a fluid medium contained in the enclosure to provide optical and thermal coupling to the array of LEDs;
• wherein the lamp, when the array of LEDs is energized, operates at a power level of at least about 5 watts.

A method of making a lamp, the method comprising:

• providing an optically transmissive enclosure;
• centrally locating an array of LEDs in the enclosure on a supporting power structure;
• connecting the supporting power structure so that the LEDs can be energized to emit light;
• and
• placing a fluid medium in the enclosure so that the fluid medium provide optical and thermal coupling to the LEDs.

A lamp comprising:

• an optically transmissive enclosure;
• an array of LEDs disposed in the enclosure to be operable to emit light when the array of LEDs is energized;
• and
• a phase change material contained in the enclosure to provide thermal coupling to the array of LEDs.