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It might still be a little ridiculous - that light is one of the most powerful in the entire world

I'm rather thinking about solar light testing facilities for space crafts here, such as ESA's Large Space Simulator.

The specs say: 'Intensity level with 19 lamps at 20 kW: 2000 W/m' (6m solar beam diameter) [2]

(Also, 'On request, the sun simulator can be equipped with 32 kW lamps'.)