blackout lamp

Henningsen designs a blackout lamp for the Tivoli Gardens in Copenhagen which allows the Gardens to stay open until midnight: the light from the lamps cannot be seen from aeroplanes flying over the city.

I took her good-naturedly by the shoulder, made detours through dark side streets, stopped with her in February or March under blue blackout lamps, propelled her along to the next lamppost, pressed her against wrought-iron garden fences, and encouraged her to go to Berlin with Haseloff.