LED illumination devices and methods

An LED illumination device, comprising:

• a light emitting diode (LED);
• a generally curved lens having a flat surface positioned adjacent to a light emitting surface face of the LED;
• wherein the lens has an index of refraction relative to a light wavelength emitted by the LED of greater than about 1.65;
• a thermal cup comprising a hollow post;
• a circuit board comprising a hole, wherein the hole is disposed to receive the hollow post, wherein the circuit board is configured to move along an axis that is parallel to a surface of the circuit board;
• a spring disposed around the hollow post;
• and
• a wire, wherein a first end of the wire is connected to the light emitting diode, wherein a second end of the wire is connected to the circuit board, and wherein the wire passes through the hollow portion of the hollow post.