How To Calculate Amps For Led Lights

To calculate an led s power use simply multiply the led s voltage in volts by the led s current in amperes.

How to calculate amps for led lights. For example the waveform filmgrade led strip power draw is 5 5 watts per foot. A simple formula for calculating amps is to take the watts and divide that by the volts. If your led lights bars draw a total of 1500 watts then i suggest a 150 amp fuse. Step by step information on how to calculate power supply requirements.

V led is the voltage drop across the led measured in volts v i led is the current through the led measured in amperes amps a and. An upcoming project requires 20 ft of 120 volt led rope light. I m calculating basic amperage w v a i have a track light with 33 led lamps that is experiencing an unusually high failure rate. R is the resistance measured in ohms ω.

You can typically find this information listed on the product page or. I want to use a wall wart to power a strip of lights but i think i need to know how many amps they will draw in order to select the right wall wart. For example if your led has a voltage of 3 6 and a current of 20 milliamperes it will use 72 milliwatts of power. Determine the voltage and watts per foot or meter for the led strip.

Use the calculator below to find the total wattage and amperage requirements of your lighting project. 1500w 12v 125 amps but you should add a bit of a buffer about 20 more so a 150 amp fuse is perfect. How many amps will we need to power this. The packaging doesn t say anything about their current draw neither amperage or watts.

Determine the length of led strip you will connect to a single power supply step 2. There are tools that you can use to calculate amperage as well such as a multimeter. I have some warm white solid color led strips. The strips themselves are marked as 12vdc.

When calculating amperage would i use the 120v that the entire lamp is using or would i use a low voltage amount such as 12v or 24v since the lamps have an integrated driver. So for instance if the wattage of the lighting fixture you re working with is 60 and the volts are 12 divide 60 by 12 and you will get five which are the amps.