Light the Night with a Low-Voltage System

Low-voltage lighting will help brighten your deck or landscape at night. Use with a low-voltage lighting system that's safe for outdoors.

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When designing your dream backyard, low-voltage lighting is just as important as landscaping, fencing, or decking. Necessary for hosting backyard BBQs, bonfires, and more, there are a number of things to consider about exterior lighting.

Think quality when buying the basics of your low-voltage outdoor lighting system, and you'll be rewarded with a system that stands up to the elements. Look for hard-to-find items in electrical supply stores. Here is the basic information you'll find helpful when searching for the right low-voltage lighting products to illuminate your home's exterior. 

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Finding the Right Transformer

Determine the size of the low-voltage transformer you need by counting the total number of lamps in your lighting plan and multiplying that number by the wattage of each lamp. Buy a transformer that's rated to carry 20 to 25 percent more than your total wattage. For example, if you have twelve 20-watt lamps in your plan, your total wattage is 240. Add a 20 to 25 percent excess to increase the wattage by 48 to 60 watts. You would need a 300-watt transformer.

Buy a transformer based on its continuous wattage. For example, a transformer that runs 300 watts continuously may be rated as high as 400 watts, but you'll be happier with its output if you purchase it for a system that requires slightly less than 300 watts.

Buy a transformer that has multiple taps: 12, 13, and 14 volts. That allows you to tap onto the 13- or 14-volt lines if you have a long run; the higher capacity improves the flow of electricity through the cable and ensures bright lights at the end of a long run. Tap onto the 12-volt line for close-in lighting. Splitting up the electrical lines among taps ensures that the lamps get more even voltage and the front lamp doesn't burn up. Although you may tap into more than one line, it's important that the total wattage on all cables does not exceed the transformer's rated wattage.

Low-Voltage Lighting Materials

  • Cable: Electrical cable brings electricity from the transformer to the light fixtures. Low-voltage wiring is usually two-conductor (two wires encased in insulation and fused together) direct-burial (DB) cable with wire sizes numbered 12, 14, and 16. Try not to exceed a length of 160 feet.
  • Wire nuts: These solderless connectors screw on over stripped wires to ensure good electrical connections. Wire nuts are color-coded to the size of the wire.
  • Electrician's tape: This black plastic tape is waterproof and protects from moisture.
  • Light fixtures and lamps (lightbulbs): Various manufacturers produce fixtures for low-voltage lighting systems. The fixtures come wired and simply connect to the low-voltage cable. You can also find specialty low-valtage light bulbs at most hardware stores. 

Cost of Low-Voltage Outdoor Lighting

Low-voltage landscape lighting comes at a wide range of costs. Tier lighting costs $9 to $20 per unit. Solar versions range from $13 to $30. Entrance lights will make a statement from $10 to $20 per unit. Floodlamps that illuminate a large area will cost between $33 to $63 dollars. It's also not a bad idea to install small floodlights triggered by a motion detector. These vary in price from $11 to $25. This same per-unit price range applies to well and mushroom lights.

Styles of Fixtures

Packaged landscape lighting kits contain a variety of popular fixtures, plus the hardware and transformer needed for installation. If that doesn't fit your needs, fixtures, transformers, lamps, and timers can also be purchased separately.

These are the six types of low-voltage lighting to choose from.

Entrance Lights

Entrance lights provide general illumination along walks and driveways. They also improve the curb appeal of your front yard or patio. Light adds dimension to the landscape. Darkness makes everything appear two-dimensional. Lighting helps the eye to pick up depth, especially if lights are used in corners rather than on flat expanses of wall.

Tier Lighting

Tier lighting is often used along borders for a soft, decorative accent. These are great to have near walkways, especially at night when visibility is compromised. Low voltage path lighting should never attempt to duplicate daylight. Low-level glows create interest and shadows, so be sure to check with your hardware store expert about which bulbs are best for you. 

Globe Lights

Globe lights provide general lighting without glare. They are often more decorative rather than purposeful. When spread out on a patio or garden, globe lights softly illuminate a large area. You can get the same effect of low-voltage exterior lighting by hanging twinkle string lights across your patio. 

Learn how to hang string lights on your patio.

Mushroom Lights

Mushroom lights refer to lamps where the source of the light is hidden, providing a soft, glowing effect. When in use, a glow of light rather than the fixture itself should be apparent. Low-profile fixtures easily hide behind plants, or simple garden lights, such as this, don't distract from the beautiful flowers in the day or night. 

Well Lighting

Well lighting sends the light beam upward, which is useful for accenting trees, bushes, and buildings. Light directed up is more interesting than light pointed down. Floodlights at ground level illuminate the deck and are a great way to mimic the effect of well lighting. A well light shines up at the tree; these low-profile lights can be set into the soil so as not to interfere with the lawnmower.

Floodlights

Floodlights send out a strong beam for backlighting or highlighting. These work great above or near doorways to cast a light out even when you're inside. If you need security lighting, install floodlights that operate separately from landscape lighting. While they do serve an important function, you can still find security lights in stylish designs. 

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