Köln (disambiguation)

Köln (Cologne) is the fourth largest city in Germany.

Köln may also refer to:

Places

German navy ships

Music

gollark: That probably doesn't push it up to the efficiency of just shining light on them directly, but it maybe makes it less bad.
gollark: I read somewhere that plants work more efficiently if you can tightly control the frequency of light you feed to them, and the duty cycle and stuff.
gollark: Just make your solar panels 200% efficient, silly.
gollark: Ideally, nuclear if people weren't bees.
gollark: I was envisioning electric ones here, but I don't know if they'd be cheaper.

See also

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