How To Replace a Post Light

It might be time to swap out your old outside post light if it has a lot of wear and tear or it no longer efficiently lights your walkway. Not only will changing it update your home’s curb appeal, but it’ll also make it significantly safer to walk around your home’s exterior when it’s dark out. In our article, we’ll explain how to replace a post light and switch to an astronomical timer. We’ve also included a video featuring This Old House’s master electrician, Scott Caron, who shares the steps to replace a lamppost light in a homeowner’s driveway.

Assessing Your Current Post Light

Before you replace your light, assess your current situation to figure out the scope of work required and learn if you’re going to run into any challenges during the process. Below are some tips to help you with your evaluations.

Identifying Issues With the Current Light

Take a close look at your existing post light to see if you have the following problems:

• Cracked or damaged light fixture
• Faulty wiring or switches
• Rusted or corroded components
• Unstable or wobbly post

Determining the Need for Replacement

You might just need a simple repair, but if you’ve noticed several problems or it’s severely outdated, it’s time for a change. Consider factors such as:

• Aesthetic appeal
• Age of the fixture
• Energy efficiency
• Safety concerns

Choosing a New Post Light

When you’ve decided you need to get a new post light, there are a few things to think about while you’re shopping for one. 

Selecting the Right Material

Post lights come in different materials, each with its own advantages. Here are some examples and their benefits:

• Aluminum: Lightweight, rust-resistant, and durable.
• Cast iron: Classic look, heavy-duty, but prone to rust.
• Composite: Low-maintenance and weather-resistant.
• Copper: Develops a beautiful patina over time.

Considering Light Output and Efficiency

If your post is old enough, it might still have a light bulb, but modern post lights often feature LED technology. There are some reasons you might choose LED over the traditional light bulb, which include:

• Consistent light output
• Energy efficiency
• Long-lasting illumination
• No need for bulb replacements

Matching Your Home’s Style

In the video, Caron explains how the post light matched the homeowner’s roof line and material. You can also find one that complements your home’s architectural style. Below are some tips:

• Colonial: Classic designs with candle-like lights.
• Craftsman: Mission-style fixtures with geometric patterns.
• Modern: Sleek designs with clean lines.
• Traditional: Lantern-style fixtures with decorative details.

Preparing for a Post Light Installation

Once you’ve chosen the right post light to match your home and needs, you need to take a few steps to prepare for the installation. 

Gathering Necessary Tools and Materials

Collect all the tools and items you’ll need:

• Aluminum post (if replacing)
• Electrical tape
• Fast-setting concrete
• Level
• New post light fixture
• Pliers
• Screwdriver
• Shovel
• Wire cutters
• Wire nuts

Safety Precautions

In addition to gathering your tools beforehand, you also need to prioritize safety throughout the installation process. Take the steps below to get started:

• Have a helper present to assist with lifting and stabilizing the post.
• Turn off the power to the circuit at the breaker box.
• Use insulated tools when working with electrical components.
• Wear protective gear, such as gloves and safety glasses.

Removing the Old Post Light

Now you’re ready to begin replacing your old post. The first step is to remove the existing fixture, so you’ll need to disconnect the wiring and remove the post from the ground. 

Disconnecting the Electrical Connections

Start by disconnecting the wiring:

1. Remove the light fixture from the post.
2. Unscrew the wire nuts connecting the fixture to the post wiring.
3. Pull the wires apart and cap them with wire nuts for safety.

Extracting the Old Post

Once you’ve disconnected the wiring, you can remove the old post. Follow these steps:

1. Dig around the base of the post to expose the concrete footing.
2. Rock the post gently to loosen it from the ground.
3. Lift the post out of the hole but be careful not to damage the underground wiring.

Installing the New Post Light

You’re all set to install your new post light. You have to set it in concrete and make sure it’s level and secure. 

Positioning the New Post

Make sure you position the post for stability. To do this: 

1. Place the new post in the existing hole.
2. Snake the underground wiring through the post.
3. Use a level to check that the post is plumb.

Securing the Post with Concrete

After you’ve placed the post where it belongs:

1. Pour fast-setting concrete mix into the hole around the post.
2. Add water according to the manufacturer’s instructions.
3. Allow the concrete to set for at least an hour before proceeding.

Wiring the New Light Fixture

You’re ready to wire your post and mount its head. Follow the steps we’ve outlined below carefully for a safe and functional connection.

Connecting the Wires

Here’s how to connect the new post light:

1. Strip the ends of the wires if necessary.
2. Match the colored wires (typically black to black, white to white, and green or bare copper to ground).
3. Twist the matching wires together and screw it in place with wire nuts.
4. Wrap the connections with electrical tape for added protection.

Mounting the Fixture

Once you’ve connected the wires, you can mount the new fixture. Use these steps:

1. Tuck the wires into the post.
2. Align the fixture with the mounting holes on the post.
3. Screw the fixture using the provided screws or bolts.
4. Check that the fixture is level and tightly fastened.

Upgrading the Light Post Switch

You may also want to upgrade your switch, especially if the post isn’t on an astronomical timer. This device automatically adjusts the light’s on/off times based on sunrise and sunset throughout the year.

Installing an Astronomical Timer

Follow these steps to install the new timer:

1. Remove the old switch from the electrical box.
2. Connect the wires to the new timer according to the manufacturer’s instructions.
3. Mount the timer in the electrical box.
4. Install a weatherproof cover over the timer for outdoor protection.

Testing and Adjusting the New Post Light

Now that you’ve installed the post light and new switch, it’s time to test it out.

Verifying Proper Operation

Turn the power back on and test the light by doing the following:

1. Activate the switch or timer. 
2. Check for any flickering or unusual behavior.
3. Verify that the timer functions correctly if you installed one.

Fine-Tuning the Light Position

Make any final adjustments to the light fixture. Do the following:

1. Loosen the mounting screws slightly if needed.
2. Adjust the fixture’s position for optimal illumination.
3. Retighten all screws and connections.

Our Conclusion

By replacing your post light, you’ll improve your home’s exterior lighting and its safety by illuminating your walkway on dark nights. Remember to take all the necessary precautions before starting this project, such as turning off the power to your circuit breaker. This is a relatively simple task for a homeowner to complete by themselves, but contact a professional if you don’t have any electrical experience. 

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