How to Connect LED lights with same switch

How to Connect Multiple LED Lights to One Power Source

Let there be light! Tired of playing hide-and-seek with tangled wires? Unleash your inner electrician and learn the mesmerizing art of connecting multiple LED lights to one power source. We’re about to spill the illuminating beans and guide you through a dazzling adventure that will leave your space aglow with brilliance. Get ready to be the luminary maestro you’ve always dreamed of – no Ph.D. in Electrical Engineering is required! Let’s dive in and shed some light on the magical world of LED connectivity.

In this article, we will guide you through the process of how to connect multiple LED lights to one power source, ensuring an efficient and safe lighting setup.

Understanding LED Lights

Before we delve into the process of connecting multiple LED lights, it’s essential to understand the basics of LED technology. LED stands for “light-emitting diode,” which is a semiconductor device that emits light when an electric current passes through it. Unlike traditional incandescent or fluorescent bulbs, LED lights consume less energy and have a longer lifespan.

LED lights are available in various shapes, sizes, and colors, making them highly versatile for different applications. They are commonly used for general lighting, accent lighting, task lighting, and decorative purposes. Understanding the characteristics and requirements of LED lights will help you make informed decisions when connecting them to a power source

Connect Multiple LED Lights to one power source

Factors to Consider Before Connecting Multiple LED Lights

Before you start connecting multiple LED lights, there are a few factors you need to consider to ensure a successful and safe installation.

Power Supply Rating

The power supply rating refers to the amount of electrical power that the power supply unit can deliver. It is crucial to select a power supply with an adequate rating to meet the combined power requirements of all the LED lights you intend to connect. The power supply’s wattage should exceed the total wattage of the LED lights to avoid overloading and potential damage.

Current Rating

Each LED light has a specific current rating, which indicates the amount of current it requires to operate correctly. When connecting multiple LED lights, it is essential to calculate the total current required by adding up the individual current ratings. This information will help you choose the appropriate wiring and ensure that the power source can provide sufficient current.

Wiring Configuration

LED lights can be connected in either series or parallel configurations.

Series Configuration:

In a series connection, the positive terminal of one LED light is connected to the negative terminal of the next LED light, forming a continuous loop.

Parallel Connection:

In a parallel connection, all the positive terminals are connected together, and all the negative terminals are connected together.

A parallel wiring configuration is generally recommended when connecting multiple LED lights to one power source. This setup ensures that each LED light receives the same voltage and allows for independent operation, preventing the entire circuit from failing if one LED light malfunctions.

Now that we have covered the essential factors, let’s proceed with the step-by-step guide on connecting multiple LED lights to one power source.

parallel wiring to Connect Multiple LED Lights to one power source

Step-by-Step Guide to Connect Multiple LED Lights to One Power Source

Follow these steps to connect multiple LED lights to a single power source effectively:

Step 1: Determine Power Supply Requirements

First, identify the total power consumption of all the LED lights you want to connect. This information will help you select a power supply with the appropriate wattage rating. Ensure that the power supply can handle the combined wattage of the LED lights and has a voltage output compatible with the LED lights’ requirements.

Step 2: Calculate the Current Rating

Next, calculate the total current required by adding up the individual current ratings of the LED lights. Make sure the power supply can provide this total current without exceeding its maximum rating. you can calculate current rating using this formula

P(KVA) = VA/1000 

where V stands for voltage and A stands for current in amperes.

Step 3: Choose the Right Wiring Configuration

As mentioned earlier, it is advisable to connect the LED lights in parallel to ensure independent operation and avoid circuit failure due to a single LED light malfunctioning. Prepare the necessary wires and connectors for the parallel wiring setup.

Step 4: Connect the LED Lights in Parallel

Start by connecting all the positive terminals of the LED lights together using a wire or connector. Similarly, connect all the negative terminals of the LED lights. Use appropriate connectors to ensure secure and reliable connections.

Step 5: Test the Connection

After completing the wiring connections, double-check all the connections to ensure they are secure. Once verified, plug in the power supply and switch it on. The LED lights should light up simultaneously. If any LED light fails to illuminate, check the wiring and connections again.

Connecting Multiple LED Lights to One Switch

If you want to control the LED lights connected to a single power source with a switch, there are a couple of options you can consider:

Using a Relay

A relay is an electrical switch that allows a low-voltage control signal, such as from a switch, to control a higher-voltage circuit. By using a relay, you can connect the LED lights to the power source and control them using a switch connected to the relay’s control terminals.

Using a Dimmer Switch

Another option is to use a dimmer switch that supports LED lights. A dimmer switch allows you to adjust the brightness of the connected LED lights. Ensure that the dimmer switch is compatible with the LED lights and the power supply.

Safety Precautions

When working with electrical connections, it is essential to prioritize safety. Here are a few safety precautions to follow:

  • Turn off the power supply before making any connections.
  • Ensure that the power supply is compatible with the LED lights’ voltage requirements.
  • Use insulated wires and connectors to prevent electrical shocks and short circuits.
  • Avoid overloading the power supply by exceeding its wattage rating.
  • Regularly inspect the connections for any signs of damage or loose connections.
  • If you are uncertain about the electrical connections, consider consulting a professional electrician.

Troubleshooting Common Issues

If you encounter any issues during the installation or operation of the LED lights, here are some common problems and possible solutions:

LED lights not turning on: 

Check the power supply connections, verify the wiring, and ensure the power supply is switched on.

Dim or flickering LED lights: 

This can indicate an insufficient power supply or an incompatible dimmer switch. Verify the power supply’s wattage and ensure the dimmer switch is suitable for LED lights. Learn more about Flicking here.

Uneven brightness among LED lights: 

Ensure that all the connections are secure and the wiring lengths are equal for parallel connections. In case of series connections, check for loose connections or damaged LED lights.

connecting different  led lights with single power source


Connecting multiple LED lights to one power source allows you to create a visually appealing and well-lit space efficiently. By considering factors like power supply rating, current rating, and wiring configuration, you can ensure a safe and reliable installation. Following the step-by-step guide and implementing the necessary safety precautions will help you achieve a successful connection.

If you have any further questions or need assistance with connecting multiple LED lights, feel free to reach out to a qualified electrician or consult the manufacturer’s guidelines for your specific LED lights and power supply.


Can I connect LED lights of different wattages to one power source?

It is generally recommended to connect LED lights of the same wattage to ensure consistent performance and prevent issues related to power distribution. However, if the voltage requirements of the LED lights are compatible and the power supply can handle the combined wattage, you can connect LED lights of different wattages.

Can I connect LED lights in series instead of parallel?

While it is possible to connect LED lights in series, it is generally not recommended when connecting multiple lights to one power source. Series connections can lead to voltage drops across each LED light, resulting in dimmer lights towards the end of the series. Additionally, if one LED light fails in a series connection, the entire circuit may stop working.

Do I need to use a specific type of wire for connecting LED lights?

It is crucial to use wires that are suitable for electrical connections and have sufficient gauge to handle the current requirements of the LED lights. Copper wires with appropriate insulation, such as PVC insulation, are commonly used for LED light installations. Consult local electrical codes and regulations or seek professional advice to ensure compliance and safety.

Can I connect LED lights to a battery as the power source?

Yes, it is possible to connect LED lights to a battery as the power source. However, ensure that the battery voltage matches the LED lights’ voltage requirements. Additionally, consider the battery’s capacity and lifespan to ensure continuous operation without frequent replacements or recharging.

How many LED lights can I connect to one power source?

The number of LED lights you can connect to one power source depends on the power supply’s wattage rating and the individual wattage of the LED lights. Calculate the total wattage of the LED lights and ensure it does not exceed the power supply’s maximum wattage. It is advisable to leave some headroom to avoid overloading the power supply and ensure its longevity.

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