Total Light TL-DL150-CB Deck Light: Placement, G4 Lamp & Spacing Guide

The Total Light TL-DL150-CB Pro Grade Deck Light is a compact 12-volt half-moon fixture designed for vertical outdoor surfaces. Its curved brass shield helps keep the G4 lamp out of direct view while directing light downward toward steps, walking surfaces, walls, posts, and nearby architectural details.

The fixture uses a replaceable G4 bi-pin LED lamp sold separately. That means the deck-light body controls the physical shielding and direction of the light, while the selected G4 lamp controls output and color temperature.

This guide focuses on where to use the TL-DL150-CB, how to choose the lamp, and how to plan mounting height and spacing. For the hands-on installation process, use How to Properly Install a Total Light TL-DL150-CB Brass Deck Light.

What the TL-DL150-CB Is Designed to Do

The current product record identifies the TL-DL150-CB as a half-moon deck light for compatible 12-volt low-voltage landscape-lighting systems.

Its main design features include:

• solid-brass construction
• Classic Brass finish
• half-moon shield that directs light downward
• replaceable G4 bi-pin LED lamp
• ETL certification
• current product page lists lifetime residential and commercial warranty coverage

Use the current Total Light Warranty page for the formal warranty terms.

Where the Half-Moon Deck Light Fits Best

The TL-DL150-CB is most useful where a compact fixture can be mounted to a suitable vertical surface and the light needs to fall downward rather than project outward like a spotlight.

Common applications include:

• deck and railing posts
• outdoor steps and stair approaches
• patio and porch walls
• brick and stone columns
• retaining and seating walls
• docks and waterfront walkways when the installation is appropriate for the site
• low-level guidance lighting around outdoor living spaces

The mounting method, anchors, and fasteners should always match the actual surface.

Why the Half-Moon Shield Matters

The curved face of the fixture helps conceal the lamp from a direct horizontal view and sends more of the illumination toward the surface below.

That is useful in places where an exposed point of light would create glare, such as:

• deck seating areas
• stair approaches
• posts beside a walkway
• walls near eye level
• outdoor kitchens and gathering areas

The shield does not eliminate glare automatically. Mounting height, lamp output, fixture spacing, and the viewer's position still matter.

Choose the G4 Lamp Separately

The TL-DL150-CB uses a replaceable 12-volt G4 bi-pin LED lamp rather than a permanently integrated LED source.

Total Light's current G4 family includes:

• 2.5W: 185 lumens
• 3.5W: 265 lumens
• 2700K: warmer, slightly more golden appearance
• 3000K: slightly cleaner, more neutral warm-white appearance

Use the G4 LED Landscape Lighting Bulb Guide for the full comparison.

2.5W vs 3.5W in a Deck Light

The higher-wattage G4 lamp provides more light output, but “more” is not automatically better.

A 2.5W lamp can be a good starting point where:

• the fixture is relatively close to the walking surface
• several fixtures are repeated along posts or a wall
• a softer pool of light is preferred
• the fixture is near seating or normal sightlines

A 3.5W lamp may be useful when:

• the fixture is mounted higher
• the illuminated surface is broader
• the fixture spacing is larger
• additional output is needed after the actual layout is tested

Always confirm the lamp is compatible with the fixture and complete low-voltage system.

2700K vs 3000K for Deck Lighting

Color temperature changes the appearance of the light, not its brightness by itself.

• 2700K often complements wood, warm stone, brick, and relaxed outdoor living spaces.
• 3000K can work well with lighter masonry, modern materials, or exterior lighting that already uses a slightly cleaner warm white.

If several deck lights are visible together, matching Kelvin temperatures usually creates a more consistent result.

See 2700K vs 3000K Landscape Lighting for more detail.

How High Should a Deck Light Be Mounted?

There is no single correct height for every deck, wall, or stair. The mounting height changes the size and intensity of the pool of light below the fixture.

When choosing the height, consider:

• the width of the surface being illuminated
• the selected G4 lamp output
• how close the fixture is to eye level
• whether the fixture is near seating
• step and landing geometry
• the mounting surface and wire route

Temporarily evaluate the intended location when practical, then check the final light after dark.

How Far Apart Should Deck Lights Be?

Do not use one universal spacing number for every installation. Fixture spacing depends on mounting height, lamp output, the width of the illuminated area, surface reflectance, and how much overlap you want between pools of light.

A repeated row of fixtures can look uneven if spacing is chosen before the actual lamp and mounting height are known.

A better process is:

1. choose the mounting height
2. choose the G4 lamp
3. test one or two fixtures after dark
4. observe the width and intensity of the light pattern
5. adjust spacing before installing the complete row

Deck Posts and Railing Posts

Posts are one of the most natural locations for a half-moon deck light because the fixture can direct light down toward the deck surface while remaining visually compact.

Before finalizing the location, check:

• whether the light lands on the intended walking area
• whether the fixture will be bumped by furniture or normal use
• whether the wire can be routed and serviced
• whether adjacent fixtures create excessive overlap

Steps and Stair Approaches

The TL-DL150-CB can help define a stair approach or adjacent landing when the fixture can be mounted on a suitable vertical surface.

The goal is not to make every tread equally bright. Instead, use controlled light to help reveal the change in elevation without creating direct glare.

For stair-specific applications where a fixture needs to be integrated directly into a riser or wall, a dedicated step light may be a better fit.

Retaining and Seating Walls

A half-moon deck light can also be mounted on a suitable vertical masonry or wall surface where downward-directed light is desired.

However, if the light is being planned during construction and the goal is a more concealed installation beneath a capstone or ledge, a dedicated hardscape light may integrate more cleanly into the structure.

For new construction, decide between deck-light and hardscape-light mounting before the wall cap or finished surface is closed so the wire route and service access can be planned cleanly.

Deck Light vs Path Light

Use a deck light when a suitable vertical surface is available and you want the illumination to originate from the structure itself.

Use a path light when the fixture needs to stand in a planting bed or soil area beside the walkway.

Neither fixture type is universally better. The mounting environment should decide which one fits the project.

Deck Light vs Step Light

A deck light is an externally mounted half-moon fixture. A step light is designed specifically around step, riser, or wall applications.

If the project is already built and a compatible vertical mounting surface is available, a deck light may be practical. During new construction, a dedicated step-light layout may offer a more integrated result.

Plan the Wire Before Mounting the Fixture

A clean deck-light installation depends on the wire route as much as the fixture position.

Before drilling or mounting:

• identify the low-voltage cable route
• confirm where the fixture lead and splice will be located
• keep connections serviceable when practical
• avoid pinching cable behind the fixture
• use outdoor-rated low-voltage connections appropriate for the conductor combination
• coordinate the wire path with framing, masonry, or finished surfaces

For the exact installation workflow, see the TL-DL150-CB installation guide.

Transformer and Wire Planning

Each G4 lamp contributes its actual wattage to the connected load. Six 2.5W lamps, for example, create a different transformer load from six 3.5W lamps.

When multiple deck lights share one run, plan:

• total connected wattage
• wire length
• wire gauge
• voltage drop
• transformer capacity

Use How to Plan a Low-Voltage Landscape Lighting System and the wire-gauge guide for the complete electrical planning process.

Complete Deck-Light Kit Option

Total Light currently offers a Deck Light Complete Landscape Kit that packages six TL-DL150-CB fixtures with compatible G4 lamps, a 100W stainless-steel transformer, 250 feet of 12/2 wire, waterproof connectors, a photocell, and a wire cutter.

The kit can simplify component selection for a focused deck-lighting project, but fixture placement, wire routing, transformer location, and voltage drop still need to be planned for the property.

Brass Finish and Outdoor Exposure

The TL-DL150-CB uses solid-brass construction with a Classic Brass finish. Brass can darken, tarnish, and develop patina outdoors. That natural weathering should not be described as a permanent unchanged finish or as completely corrosion-proof.

For material and maintenance guidance, see Why Choose Brass Landscape Lighting Fixtures? and Coastal Landscape Lighting.

Frequently Asked Questions

What lamp does the TL-DL150-CB use?

It uses a replaceable 12-volt LED G4 bi-pin lamp. The lamp is sold separately.

Is the TL-DL150-CB a 120-volt deck light?

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

Can it be installed on a deck post?

Yes, when the post and mounting method are suitable for the fixture. The light opening should be positioned toward the intended surface below.

Can it be installed on brick or stone?

The current product information identifies brick and stone among its common applications. Use fasteners and anchors appropriate for the actual mounting surface.

How far apart should TL-DL150-CB deck lights be?

There is no universal spacing. Mounting height, G4 lamp output, surface width, and desired overlap determine the useful distance between fixtures.

Should I use a 2.5W or 3.5W G4 lamp?

Choose from the mounting height, fixture spacing, desired light level, and surrounding environment. The 2.5W Total Light G4 is listed at 185 lumens and the 3.5W version at 265 lumens.

Is the deck-light kit available with the TL-DL150-CB?

Yes. The current Total Light Deck Light Complete Landscape Kit includes six TL-DL150-CB fixtures and the core system components listed on the kit product page.

Use the Half-Moon Fixture for Controlled Downward Light

The TL-DL150-CB is most useful when a compact brass fixture can mount to a suitable vertical surface and direct light downward without placing an exposed lamp in the normal viewing line. Choose the G4 lamp, mounting height, and spacing together, then confirm the final effect after dark.

View the TL-DL150-CB Pro Grade Deck Light, browse all Total Light deck lights, or use the installation guide when you are ready to mount the fixture.