# Calculating amps used for low voltage lighting

Home Electrical Engineering Forum General Discussion Calculating amps used for low voltage lighting

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• #10385
Keymaster

Can anyone explain how to calculate amps used on low voltage lighting.

For example. would 10 * 50 watt 12volt bulbs use the same amps as 5 * 100 watt 240 volt bulbs.

Thanks

Dave

#11824
Keymaster

Here is an online amperage chart that might help Dave.

#11911
Keymaster

Dave
formula is as follows

Current = Power/Volts

So:

10x( 50/12 ) = ~42A

5 x (100/240) = ~2A

So the obvious answer is no! but they will both cost almost the same to run, you will have some extra overhead for the ELV transformers.

#12361
lightingworld
Participant

If you have more questions feel free to contact 1-813-978-3700 for more install information. What set of outdoor lights do you have though? Always try and use a lower amp light than you think.

#12363
imigyjunia
Participant

You might be interested in Digi-Key's NEVALO
solid state lighting system, which provides
more than 60 LED module options and
a range of 300 to 3400 lumens.

#12382
Keymaster

Ray said:In both the voltage levels ie 12 V and 230 V. power consumption is same ie 500 watts. The Amps = W/V and styhus shall be 500/12 amps and 500/230 amps

Here is an online amperage chart that might help Dave.

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