Best Replacement for Pentair GloBrite Lights: Upgrade to Pentair Micro – Pool Supply Depot

If your Pentair GloBrite pool light has stopped working, is dimming, flickering, or you are ready for a more modern lighting upgrade, replacing it with a Pentair MicroBrite Color LED light is one of the best options available.

Instead of replacing the entire pool light niche, many pool owners can use the Pentair 618040 MicroBrite to GloBrite niche adapter to install a MicroBrite light into an existing GloBrite niche.

This makes the upgrade cleaner, easier, and more cost-effective than a full niche replacement.

Shop the Parts for This Upgrade

To replace a Pentair GloBrite light with a Pentair MicroBrite light, you will typically need the adapter plus the correct cord length MicroBrite light for your pool.

Why Replace Pentair GloBrite Lights with MicroBrite Lights?

Pentair GloBrite lights have been a popular option for shallow-water areas, steps, baja shelves, beach entries, and water features. However, when a GloBrite light fails, many homeowners want a replacement option that offers modern LED performance without requiring major pool renovation work.

That is where the Pentair MicroBrite Color LED light comes in.

MicroBrite lights are compact 12V LED pool and spa lights designed for tight spaces, shallow areas, steps, benches, shelves, and other areas where larger traditional pool lights may not fit. With the correct adapter, a MicroBrite light can be installed into an existing Pentair GloBrite niche.

The Key Part: Pentair 618040 GloBrite to MicroBrite Adapter

The most important part of this conversion is the Pentair 618040 adapter.

This adapter is designed to allow a Pentair MicroBrite LED light to fit into an existing Pentair GloBrite niche. That means if your pool already has GloBrite lights installed, this adapter can provide a practical upgrade path to MicroBrite lighting without replacing the entire niche.

For many pool owners, this is the part that makes the upgrade possible.

Choosing the Right MicroBrite Cord Length

Pentair MicroBrite Color LED lights are available in different cord lengths. Choosing the right cord length is important because the cord must reach from the light location back to the junction box or equipment-side connection point.

50FT Cord — Pentair 620424

The Pentair MicroBrite Color LED Light 12V with 50FT cord is commonly used when the light location is relatively close to the junction box or equipment area.

Shop here: Pentair MicroBrite Color LED Light 12V, 50FT Cord | 620424

100FT Cord — Pentair 620425

The Pentair MicroBrite Color LED Light 12V with 100FT cord is a popular middle option for many standard pool installations.

Shop here: Pentair MicroBrite Color LED Light 12V, 100FT Cord | 620425

150FT Cord — Pentair 620426

The Pentair MicroBrite Color LED Light 12V with 150FT cord is ideal for longer runs where the light is farther from the junction box or equipment area.

Shop here: Pentair MicroBrite Color LED Light 12V, 150FT Cord | 620426

Simple Installation Process: GloBrite to MicroBrite Upgrade

Before starting, always turn off power to the pool light system at the breaker. Pool lights are underwater electrical fixtures, so this type of installation should be done by a qualified pool professional or licensed electrician.

This is a general overview of the replacement process.

1. Turn Off Power to the Pool Light

The first and most important step is to shut off power to the pool light circuit. Power should be turned off at the breaker, and the installer should verify that there is no power going to the light before removing anything.

Never work on a pool light while power is on.

2. Remove the Existing GloBrite Light

The old Pentair GloBrite light is removed from the existing niche. The installer will loosen and remove the light from the pool wall, then carefully pull the light cord out through the conduit toward the junction box.

In many cases, the old light cord can be used to help pull the new MicroBrite cord through the same conduit.

3. Disconnect the Old Light at the Junction Box

Once the old GloBrite cord is pulled back to the junction box, the installer disconnects the old light wiring. The old light can then be fully removed from the pool.

This is also a good time to inspect the junction box, conduit, transformer, and wiring condition.

4. Attach the New MicroBrite Cord for Pulling

The new Pentair MicroBrite light cord is attached to the old cord or to a pull string so it can be pulled through the existing conduit.

The correct cord length should be selected before installation. For most replacements, pool owners choose between:

5. Pull the New MicroBrite Cord Through the Conduit

The new MicroBrite cord is carefully pulled from the pool light niche back to the junction box. The installer should pull slowly and avoid damaging the cord.

Enough cord should be left at the pool wall so the light can be installed properly into the niche.

6. Install the Pentair 618040 Adapter

Once the new cord is pulled, the Pentair 618040 GloBrite to MicroBrite adapter is installed into the existing GloBrite niche.

Shop the adapter here: Pentair 618040 GloBrite to MicroBrite Adapter

This adapter allows the MicroBrite light to fit securely into the GloBrite niche.

7. Install the New Pentair MicroBrite Light

After the adapter is in place, the new Pentair MicroBrite light is installed into the adapter. The installer should follow Pentair’s installation instructions to make sure the light is seated and secured correctly.

The light should fit firmly and evenly in the adapter.

8. Connect the New Light Wiring

At the junction box, the new MicroBrite light wiring is connected to the compatible 12V pool light transformer or lighting control system.

The installer should confirm the transformer is correct for the MicroBrite light and that all electrical connections are secure and code-compliant.

9. Test the Light

Once everything is connected and secured, power can be restored and the new MicroBrite light can be tested.

The installer should confirm that:

The light turns on properly
The color-changing function works
The light is secure in the niche
There are no electrical issues
The system operates safely

Benefits of Upgrading to MicroBrite

1. Cleaner Replacement Option

Using the niche adapter allows the new MicroBrite light to fit into the existing GloBrite niche. This can reduce installation complexity compared with replacing the entire niche.

2. Modern Color LED Lighting

Pentair MicroBrite Color LED lights provide bright, color-changing pool and spa lighting in a compact design. They are a great option for pool owners who want to refresh the look of their pool at night.

3. Great for Shallow Areas and Pool Features

This upgrade is especially useful for lights installed in:

Steps
Sun shelves
Baja shelves
Benches
Swim-outs
Spas
Water features
Shallow pool areas

4. Multiple Cord Lengths Available

With 50FT, 100FT, and 150FT cord options, pool owners and installers can choose the correct MicroBrite model based on the distance from the light location to the junction box.

What You Need for the Upgrade

For a typical GloBrite to MicroBrite replacement, you may need:

Pentair 618040 GloBrite to MicroBrite adapter
Pentair MicroBrite Color LED light in the correct cord length
Compatible 12V pool light transformer
Proper electrical connection at the junction box
Qualified pool professional or electrician for installation

Is This a DIY Job?

For most pool owners, this should be handled by a qualified pool professional or licensed electrician. Pool lights are electrical components installed underwater, so safety and proper installation are extremely important.

Before installation, a professional should confirm:

The existing light is installed in a compatible GloBrite niche
The correct MicroBrite cord length is selected
The transformer is compatible with the new 12V MicroBrite light
The adapter and light are installed properly
The electrical system is safe before power is restored

When Should You Replace Your GloBrite Light?

You may want to replace your Pentair GloBrite light if:

The light no longer turns on
The light flickers
The color output is inconsistent
The light is dim
The housing or lens shows wear
You want to upgrade to a newer LED lighting option
You are already servicing or renovating the pool

Final Thoughts

Replacing a Pentair GloBrite light with a Pentair MicroBrite Color LED light using the Pentair 618040 niche adapter is one of the most practical upgrade options for many pool owners.

It allows you to keep the existing GloBrite niche while upgrading to a compact, modern MicroBrite LED light. For homeowners looking for a cleaner lighting replacement without a major pool renovation, the GloBrite to MicroBrite adapter is the part that makes the upgrade possible.

Ready to Upgrade?

Shop the parts here:

Best Replacement for Pentair GloBrite Lights: Upgrade to Pentair MicroBrite with a GloBrite Niche Adapter