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testing ballast

617 Views 0 Replies 1 Participant Last post by  Dancing frogs
I have a number of flourescent ballasts with no writing on them (bought them as a package deal on ebay), I know they work, but I have no idea of the wattage.
Can I just use the formula,Voltage squared, divided by ohms of resistance to find the output wattage?
Will the voltage be within most meter's capabilities?
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