How to Install a Total Light TL-DL150-CB Brass Deck Light

The Total Light TL-DL150-CB Pro Grade Deck Light is a compact 12V solid-brass fixture designed for vertical outdoor surfaces such as deck posts, walls, columns, and other suitable mounting locations. Its half-moon shield helps keep the replaceable G4 lamp out of direct view while directing light downward toward the surface below.

A clean installation depends on more than fastening the fixture to a post. Plan the mounting height, lamp, wire route, connection point, transformer load, and future service access together before drilling into a finished surface.

This guide covers that installation workflow using the current TL-DL150-CB product information. The exact mounting hardware and drilling method can vary with the surface, so use fasteners and anchors appropriate for the material and follow applicable electrical and building requirements.

TL-DL150-CB Installation at a Glance

• System voltage: 12V low-voltage landscape lighting
• Lamp: replaceable LED G4 bi-pin, sold separately
• Fixture material: solid brass
• Finish: Classic Brass
• Mounting style: vertical surface mounting
• Certification: ETL
• Typical applications: deck posts, walls, steps, columns, retaining walls, and other suitable vertical outdoor surfaces

For the current fixture drawing and product details, use the TL-DL150-CB specification sheet.

What You Need Before Installation

The exact tools depend on the mounting surface, but a typical installation may require:

• pencil or removable marker
• measuring tape
• drill and surface-appropriate drill bit
• surface-appropriate screws and anchors
• wire stripper/cutter
• outdoor low-voltage wire connectors appropriate for the conductors
• compatible 12V G4 LED lamp
• low-voltage landscape-lighting cable
• compatible low-voltage transformer

Do not assume one screw, anchor, connector, or drill bit is correct for wood, composite material, brick, stone, and concrete. Match the installation hardware to the actual surface.

1. De-Energize the Low-Voltage System

Disconnect power before installing, changing, or servicing low-voltage conductors. Do not make fixture connections while the transformer is energized.

Remember that the landscape-lighting side is low voltage, but the transformer itself receives line voltage. If the project requires adding or modifying a line-voltage receptacle, circuit, or supply wiring, use a qualified electrician as appropriate.

Use the Low-Voltage Landscape Lighting Installation Safety Checklist before beginning a larger project.

2. Choose the Mounting Location From the Light Pattern

Start with the surface you want to illuminate rather than choosing the mounting location only because it is easy to drill.

Consider:

• the width of the deck, landing, step, or wall below the fixture
• how high the fixture will sit above that surface
• the output of the selected G4 lamp
• whether the lamp opening will be visible from normal seating or walking positions
• where the low-voltage cable can reach the fixture cleanly
• whether the fixture and connection can be serviced later

There is no universal mounting height or spacing for every deck. The same fixture can create a different pool of light when the height, surface color, and lamp output change.

3. Check the Location From Normal Viewing Angles

The half-moon shield is designed to direct light downward and reduce direct view of the lamp, but placement still matters.

Before drilling, look at the proposed location from:

• seated positions on the deck or patio
• the top and bottom of nearby stairs
• the primary walkway
• doors and windows facing the fixture

If the light source would sit directly in a normal line of sight, adjust the location before making holes in the finished surface.

4. Plan the Wire Route Before Drilling

Decide how the fixture lead will connect to the main low-voltage cable and where that connection will remain protected and serviceable.

Plan the route so the cable is not:

• pinched behind the fixture
• pulled tightly around sharp edges
• placed where screws or future fasteners are likely to strike it
• left exposed to routine foot or equipment traffic
• routed in a way that traps or interferes with drainage

If the project is being built from scratch, planning the wire path before posts, wall caps, trim, or finished surfaces are closed can make the final installation much cleaner.

5. Mark the Fixture Position

Hold the fixture or mounting portion in the intended location and mark the mounting points and any required wire-access location using the fixture geometry and current specification information.

Before drilling, confirm that the planned holes will not interfere with concealed electrical wiring, plumbing, structural hardware, or other utilities within the surface.

For repeated fixtures along a wall or series of posts, use consistent reference points rather than assuming equal center-to-center spacing will always produce the best light pattern.

6. Prepare the Mounting Surface

Drill only the openings required for the selected mounting method and wire route. Use a drill bit appropriate for the surface.

Examples include:

• Wood: use fasteners suitable for the wood and load.
• Composite or post wraps: follow the surface manufacturer's requirements and make sure the underlying material can support the fixture.
• Brick, stone, or concrete: use anchors and masonry drilling methods appropriate for the material.

A general landscape-lighting article cannot specify one anchor for every construction type. When the mounting surface is unusual or structural conditions are uncertain, use an appropriate trade professional.

7. Connect the Fixture to the 12V Cable

With the system de-energized, connect the fixture leads to the low-voltage supply cable using connectors intended for the conductor sizes and outdoor installation environment.

Follow the connector manufacturer's instructions for:

• strip length
• conductor combination
• insertion or twisting method
• sealing method
• burial or exposure limitations

Do not rely on electrical tape alone as the environmental protection for an outdoor splice.

See Waterproof & Direct-Bury Landscape Lighting Wire Connectors for connection-planning guidance.

8. Mount the Fixture Securely

Attach the TL-DL150-CB to the prepared surface using the selected fasteners or anchors. The fixture should sit securely against the mounting surface without pinching or damaging its wire.

Orient the fixture so the shielded opening directs light toward the intended deck, step, wall, or walking surface.

Do not overtighten mounting hardware to the point that it damages the fixture, mounting surface, anchor, or surrounding finish.

9. Install a Compatible G4 LED Lamp

The TL-DL150-CB uses a replaceable 12V LED G4 bi-pin lamp, and the lamp is sold separately.

Total Light's current G4 family includes 2.5W and 3.5W options in 2700K and 3000K. Choose the lamp according to the mounting height, fixture spacing, surrounding light, and desired appearance.

• 2.5W: lower-output option, useful where the fixture is close to the surface or several lights are repeated.
• 3.5W: higher-output option when the finished location needs additional illumination.
• 2700K: warmer, slightly more golden appearance.
• 3000K: slightly cleaner warm-white appearance.

Use the G4 LED Landscape Lighting Bulb Guide for the current lamp comparison.

10. Re-Energize and Test the Fixture

After the fixture, lamp, and connections are complete, inspect the installation and then re-energize the transformer according to its instructions.

Confirm that:

• the lamp illuminates normally
• the fixture is stable
• the light falls on the intended surface
• the cable and connection are not under strain
• there is no visible damage to the fixture, lamp, or wiring

If the fixture does not operate, de-energize the system before troubleshooting. Check the lamp seating, connection, transformer operation, and measured low-voltage supply as appropriate.

For a broader diagnostic workflow, use Landscape Lighting Troubleshooting.

11. Check the Installation After Dark

A fixture can be electrically correct and still need a placement adjustment. Review the completed deck light after dark from the positions where people actually use the space.

Look for:

• direct glare from the lamp opening
• a bright hotspot immediately below the fixture
• too little light reaching the intended surface
• uneven spacing when several deck lights are installed together
• light spilling into windows or adjacent seating areas

If the light level is wrong, first consider mounting height, fixture location, lamp output, and spacing rather than automatically adding another fixture.

How Many TL-DL150-CB Deck Lights Do You Need?

There is no universal fixture count or spacing. A short set of posts may need only a few fixtures, while a larger deck with stairs, walls, and several circulation zones may need more.

Count the surfaces that actually need light, then test the pool created by the chosen G4 lamp and mounting height. The separate TL-DL150-CB placement and spacing guide covers this design decision in more detail.

Transformer and Wire Planning for Multiple Deck Lights

When several TL-DL150-CB fixtures share one low-voltage system, add the wattage of the actual G4 lamps to the rest of the connected lighting load before selecting the transformer.

Also consider:

• wire gauge
• one-way run length
• connected load on each run
• voltage drop
• connection locations

A larger transformer does not by itself correct voltage drop on a long or undersized cable run.

Use How to Plan a Low-Voltage Landscape Lighting System and 10/2 vs 12/2 vs 14/2 Landscape Lighting Wire Gauge for system planning.

Maintenance After Installation

Inspect the deck light periodically and after work is performed around the mounting surface.

Check for:

• dirt or debris blocking the light opening
• a loose fixture or damaged mounting surface
• lamp failure or an incorrect replacement lamp
• exposed, pinched, or damaged low-voltage wire
• changes in the light pattern caused by furniture, planting, or nearby construction

Solid brass can darken, tarnish, and develop patina outdoors. Treat that natural surface change separately from functional damage. Use fixture-appropriate cleaning methods and avoid harsh abrasives unless specifically supported by the product-care instructions.

See Landscape Lighting Maintenance Checklist for the complete system review.

Frequently Asked Questions

Does the TL-DL150-CB include a G4 lamp?

No. The fixture uses a replaceable 12V LED G4 bi-pin lamp, which is sold separately.

Can the TL-DL150-CB connect directly to household voltage?

No. It is designed for a compatible 12V low-voltage landscape-lighting system and requires an appropriately sized transformer.

Can I install the deck light on wood, brick, or stone?

The fixture can be used on suitable vertical surfaces, including wood, brick, stone, and masonry applications. The drilling method, fasteners, and anchors must be appropriate for the actual surface.

How high should I mount the TL-DL150-CB?

There is no universal height. Choose the position from the surface being illuminated, the G4 lamp output, direct-view glare, fixture spacing, and the available mounting and wire route. Test the final effect after dark.

How far apart should the deck lights be?

Spacing depends on mounting height, lamp output, surface reflectance, and desired overlap. Test one or two fixtures before committing to a full repeated layout when practical.

Can I connect several TL-DL150-CB fixtures to one transformer?

Yes, when the transformer has appropriate capacity for the total connected lamp wattage and the wire runs are designed for the load and distance.

Can the TL-DL150-CB be submerged?

Do not assume an ordinary deck-light installation is suitable for submerged or specialized pool, spa, or water-feature locations. Use equipment specifically identified for the exact water-related application and follow the applicable installation requirements.

Plan the Installation Before You Drill

The most reliable TL-DL150-CB installation starts with the finished lighting effect and works backward: choose the surface to illuminate, select the G4 lamp, plan the mounting height and wire route, make the outdoor connection with the system de-energized, mount the fixture securely, and then evaluate the result after dark.

View the TL-DL150-CB Pro Grade Deck Light, compare Total Light deck lights, or use the complete low-voltage landscape-lighting planning guide when the deck lights are part of a larger property-wide system.