How many amps does a 9 watt LED bulb draw. So say with the engine off and battery supplying the power 12v a 55w pair of lamps will draw just a smidge over 9 amps less with the alternator supplying power 14v almost 8 amps. How Does A Zero Watt Bulb Emit Light Quora Using that formula we know Watts and volts so wv amps. . In addition to high output and low power usage. We have all the replacement bulbs for your 1967 Plymouth GTX so you can be prepared including super bright LEDs. P3 International P4460 Kill A Watt EZ last accessed. Note there are Electricity Usage Monitors available to measure actual electricity consumption of an electrical device such as eg. 211 Base. At 120 volts the most common household current in the United States a 100-watt light bulb draws 083 amps. Given this to find amps given power and voltage use the following formula. How many amps does a 4 foot LED light draw. Find out how much