Your own energy

Solution

The idea would be to place an outdoor backlight in a bus stop with a lever-generated energy supply. The user should activate the lever to generate energy to the outdoor. 
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The message is: Thank youThis outdoor would spent 6Kw energy if it wasn�t for your effort. Know about ours in www.deutschebahn.com/ecosave.
And invites to know what are the efforts DB is doing
It has a strong viral potential and could be adapted to any outdoor media that needs illumination.
.Think about that in a 30 meters-long outdoor with many levers controlling many lights. The message would be about the group effort, and would be really strong.
.Hope you all like it.