Abstract: A lighting installation includes a light fixture having a socket adapted to electrically connect to at least one lamp, the light fixture having a line voltage input, a neutral input and a ground input. Also included is a circuit for suppressing electrical surges including output leads for line voltage and neutral to the socket, a first varistor connecting the line voltage input and ground input, a second varistor connecting the line voltage input and neutral input, a third varistor connecting the ground input and neutral input, a resistor connecting the line voltage input and line voltage output, and a resistor connecting the neutral input and neutral output.

Abstract: A method of forming diffusion holes in a super alloy article by electrical discharge machining by the steps of (a) inserting onto an electrical discharge machine a multiple piece electrode with at least one tooth with respectively at least one movable elongated rod wherein each rod is positioned through each tooth and secured to the tooth, and (b) advancing the multiple piece electrode during electrical discharge machining longitudinally into the super alloy article so that the rod forms a hole with a metering section in the super alloy article of about 0.010 inches in diameter at a depth in excess of about 0.250 inches and the tooth forms a diffused area, with an angle of about 10 degrees, at one end of the hole.