Many poultrymen find it advantageous to have a low wattage light burning all night so that hungry individuals may get a meal and return to the perches at all times.
"A Living from the Land"
William B. Duryee
What wattage have you available?"
"Invaders from the Infinite"
John Wood Campbell
The radio contact between the men outside had been limited to a few millimicrowatts of power-necessarily, since radio waves of very small wattage can be decoded at tremendous distances in open space.
"Anything You Can Do"
Gordon Randall Garrett