Patent ID: 8547016

Claim:
An electric discharge lamp unit, comprising: a casing which houses an integrated circuit for lighting an electric discharge lamp; and a support member which supports the electric discharge lamp and is integrated with the casing, wherein the casing is filled with filler, and a center of the support member in the vertical direction is higher than a center of the casing in the vertical direction and a center of the integrated circuit in the vertical direction, the integrated circuit includes: a power circuit which generates electric power supplied to the electric discharge lamp; and a control circuit which controls the power circuit, wherein the power circuit and the control circuit are arranged in the integrated circuit so that a distance between the support member and the control circuit is longer than a distance between the support member and the power circuit, and the power circuit, the control circuit and the support member exist in the same area within the casing and are secured by a single portion of the filler.