as long as the wind blows through the room. ... Ottherwise they don't do much, for 24 hours at a time. Brown-outs are the answer to the electricty crisis or "Dumsor" as it is known. Low water levels above the three dams means in some places 30 minutes power in a 24 hour period. (even though here, the sun always shines, the wind always blows and one windmill would power the whole place).
It also means you can rely on the Internot to fail just when you need it most. If this gets posted, it will be an electrical miracle!