Join Date: Nov 2007
Location: Vancouver Island
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Rep Power: 9
The formula is 75% of the wattage divided by voltage times hours of sunlight per day. That should get you in the ball park.
There is a tide in the affairs of men,
Which, taken at the flood, leads on to fortune;
Omitted, all the voyage of their life
Is bound in shallows and in miseries.
Shakespeare, Julius Caesar IV, iii, 217