ocr: How much power does a windmill produce? The power that a windmill produces is the amount of energy (measured in joules) it outputs each second. Power 1s measured in watts. One watt is equal to one joule per second. A wind turbine might produce five million watts of power. Thats five million joules of energy each second. A typical electric light bulb uses up power at a rate of 100 watts. This means that one wind turbine could light up 50,000 bulbs at a time. Av whole field full of wind turbines, called a "wind farm, a could create enough power for a small town. Unfortunately, though, it would o ...