Little display of big lamps

Here is one of my collection displays, showing some really large and unusual lamps. From top to bottom we have a 3 kW 4-electrode soviet sodium-scandium MH lamp, an 18 kW German metal halide short-arc lamp, a 7 kW Soviet stage and studio MH arc lamp, and three xenon short-arc lamps on the bottom shelf, two 1-kW lamps on top and a big 20-kW one at the bottom. The latter came from old NASA stock and was used for the illuminations of launchpads at Cape Canaveral.