How Many Amps Does a Lamp Use and How to Calculate It

How Many Amps Does a Lamp Use and How to Calculate It

Lamps have been in the household for a very long time. Even when people had no electricity, there used to be oil lamps. The source of light was used throughout the civilization. 

As modern technology advanced, so did our good old friend the lamp. It switched to minimalism, has touch sensors and some even have sound sensors. 

For the continent of the users, a lot of functions are now included in a lamp. You get to use different light settings, control it from your smartphone, and even set a timer on it. 

Depending on your mood, you can also set the light’s brightness and temperature. It’s an all-in-one solution. 

But did it ever come to your mind that how many amps does a lamp use? Well, it might have been on the day you were paying your electric bill. 

Today we are going to talk about that. 

How Many Amps Does a Lamp Use

As we have already said that the lamp has evolved in time, and so did its accessories. The foremost important thing is the light bulb, more lamps have switched to LEDs rather than traditional incandescent bulbs. 

Old incandescent bulbs consume a lot of electricity. Hence, a lot of amps are at work. Normally an incandescent bulb will consume between 50W-150W.

This number is the same for fluorescent, halogen, and CFL bulbs. They all round up around the same number of amp usage. 

Modern LEDs on the other hand just consume 10-20 watts. Although they produce the same amount as other traditional light bulbs, it is because of their build structure that they consume less energy. So fewer amps are involved with an LED. 

Calculating Amps Used by a Lamp

There are a few different elements that should be brought into consideration when you are calculating the amps used by your lamp. 

The first thing is the lamp itself. What type of light bulb is used can play a big role here. Depending on the type of bulb (LED, 3-way, incandescent, fluorescent, halogen) the amps might go high up or lower down significantly. 

Secondly the wattage of the bulb. The more wattage they will consume, the more amps they will use. 

Thirdly, the type of line you are using. This indicates the price, draw, and power consumption altogether. A single-phase line, a double-phase line, a three-phase line, or an industrial phase will give different amounts of power. And the draw will be less as the phase increases.

Another thing is the volt of electricity. A 110V line will give a higher draw and a 240V line will require less. 

By putting all of these things into consideration, you can calculate the amps by inserting the numbers in the I=P/V formula. 

I represent current, P means the power, and V is the voltage. 

And you will get your exact answer. 

Frequently Asked Questions 

How many amps is a table lamp?

There are a lot of factors that play when we are calculating the amps of a table lamp. The type of connection, the bulb, and the lamp itself will have different amps. But normally a 60W lamp will use 0.6 amps at maximum. Also, if the bulb is incandescent, the amps will go high. 

How many amps does a 100-watt LED light bulb use?

A 100-watt LED will use 8.3 amps. This number is on a 12 V system. If the system is 24V, it will decrease significantly. It’ll be around 4.16 amps. You can calculate it simply by dividing the total wattage of the bulb by the system volt. 

How many amps is a LED light bulb?

Different watts of LED light bulbs will have different amps. For instance, a 60W LED will have 5 amps or less depending on the system voltage. 

How many amps does a 60-watt LED light bulb use?

Normally a 60-watt LED light will draw 5 amps on a 12V system. If it is a 24V system, the amps are cut down significantly to 2.5 amps. 


There are many factors in play when you are calculating the amps of your lamp. The easiest thing to do is know what is your bulb’s wattage age and divide it by your system output. This way you will know how much amps the bulb is consuming. Hence the lamp consumption will come out easily. 

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