Metal Pushbutton Switch offers white ring and point illumination.

Available with integrated 5, 12, and 24 V resistor options, MSM series offers white illumination to supplement existing red, green, yellow, and blue options. Construction includes

[source: http://news.thomasnet.com/fullstory/Metal-Pushbutton-Switch-offers-white-ring-and-point-illumination-20005670]