Voltage vs Current: Key Differences & Applications

November 01, 2022

Voltage vs Current: Brightening Up Your Lighting Knowledge

When it comes to lighting technology, understanding the basics of electricity is key. Two important concepts are voltage and current, which are often used interchangeably but have distinct meanings.

What is Voltage?

Voltage, measured in volts (V), is a measure of electric potential difference between two points in a circuit. It is the force that makes electrons flow from one point to another in a circuit. More voltage means more force and more electrical energy.

For example, if you have a 12V battery, it means that there is a potential difference of 12 volts between its positive and negative terminals.

What is Current?

Current, measured in amperes (A or amps), is a measure of the rate at which electric charge flows through a circuit. It is the flow of electrons, or the amount of electricity passing through a circuit.

For instance, if you plug in a 60W light bulb into a 120V outlet, it will draw 0.5 amps of current since 60W/120V = 0.5A.

The Relationship Between Voltage and Current

Voltage and current are related to each other in lighting technology. In any circuit, the current will flow from a higher voltage point to a lower voltage point. The amount of current depends on the amount of voltage and the resistance of the circuit.

Generally, a higher voltage means a higher current, but this isn't always the case. This is because the resistance of the circuit can affect the current. The higher the resistance, the lower the current for a given voltage.


Understanding the difference between voltage and current is important for lighting technology applications. For example, when choosing the right light bulb, you need to consider both voltage and current.

LED lights typically operate at a lower voltage and consume less current than incandescent bulbs. This means they are more energy-efficient and can last longer. However, they require a transformer to step down the voltage from 120V to 12V or 24V.


Voltage and current are two of the most fundamental concepts in lighting technology. Voltage is the force that drives electric charge in a circuit, while current is the rate of electric charge flow. These concepts work together to determine the brightness, energy efficiency, and lifespan of lighting technology products.


  1. https://www.electronics-tutorials.ws/dccircuits/dcp_3.html
  2. https://en.wikipedia.org/wiki/Voltage
  3. https://en.wikipedia.org/wiki/Electric_current

We hope this blog post has helped you gain a better understanding of the differences between voltage and current in lighting technology. Remember, always be mindful of the light bulbs and lighting products you choose to ensure maximum efficiency and cost savings.

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