A sealed high intensity illumination device (300, 400, 1200, 1300) configured to receive a laser beam (362, 365, 1365) from a laser light source comprising: a sealed chamber (320, 1220, 1320) configured to contain an ionizable gas, the chamber further comprising: an integral reflective chamber interior surface having a focal region (322, 1222, 1321); a substantially flat ingress window disposed within a wall of the integral reflective chamber interior surface configured to admit the laser beam into the chamber; a plasma sustaining region; a plasma ignition region; and a high intensity light egress window (328, 1228, 1328) configured to emit high intensity light (329, 1329) from the chamber, wherein the integral reflective chamber interior surface is configured to reflect high intensity light from the plasma sustaining region to the egress window, and a path of the laser beam from the laser light source through the ingress window to the focal region is direct, characterized in that the integral reflective chamber interior surface further comprises: a first substantially parabolic contour having a first parabolic focus coinciding with the plasma sustaining region and the focal region; a second substantially parabolic contour having a second parabolic focus coinciding with the egress window; and a mirror disposed within the chamber configured to reflect high intensity light to and from the first parabolic focus via the first parabolic contour, wherein the second parabolic contour is configured to reflect light from the first parabolic contour to the second parabolic focus. a sealed chamber (320, 1220, 1320) configured to contain an ionizable gas, the chamber further comprising: an integral reflective chamber interior surface having a focal region (322, 1222, 1321); a substantially flat ingress window disposed within a wall of the integral reflective chamber interior surface configured to admit the laser beam into the chamber; a plasma sustaining region; a plasma ignition region; and a high intensity light egress window (328, 1228, 1328) configured to emit high intensity light (329, 1329) from the chamber, wherein the integral reflective chamber interior surface is configured to reflect high intensity light from the plasma sustaining region to the egress window, and a path of the laser beam from the laser light source through the ingress window to the focal region is direct, characterized in that an integral reflective chamber interior surface having a focal region (322, 1222, 1321); a substantially flat ingress window disposed within a wall of the integral reflective chamber interior surface configured to admit the laser beam into the chamber; a plasma sustaining region; a plasma ignition region; and a high intensity light egress window (328, 1228, 1328) configured to emit high intensity light (329, 1329) from the chamber, a first substantially parabolic contour having a first parabolic focus coinciding with the plasma sustaining region and the focal region; a second substantially parabolic contour having a second parabolic focus coinciding with the egress window; and a mirror disposed within the chamber configured to reflect high intensity light to and from the first parabolic focus via the first parabolic contour, wherein the second parabolic contour is configured to reflect light from the first parabolic contour to the second parabolic focus.