http://www.outdoorlanternsonsale.com/dynamo-flashlight/
How much energy of a dynamo to generate?
I'm talking about the dynamo powered flashlights. Preferably in or joule Watts. I also wonder if it's a crank / second / whatever
A bit of physics first. Joules are units of energy, but power is the energy delivered in a given time, so divided joules per second (which is actually watts), gives a power unit, which is you want. Without knowing the size of the flashlight bulb, we can only give an estimate, but say it is a bulb 6V, 0.25A design, power is 6 x 0.25 = 1.5 watts. It continues the speed at which your dynamo would provide the energy to light the bulb continuously whether or crank rotation
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