Conversion from watts to horsepower use, 746 watts = 1 HP.
How many foot candles in a 150 watt bulb?
I think the term you mean is "candle power" (candelas is a conversion of the power of a bulb in comparison to the power of a candle) The standard 40 watt bulb power would depend on the configuration...
Watts is voltage (in volts) x current (in amps)
km=1000m