The Modern LED Approach to Outdoor Living

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Lighting your landscape is no longer just about seeing where you walk; it’s about creating an outdoor “resort feel” while using a fraction of the energy required by older systems.

WHY CHOOSE LED?
Modern LED (Light Emitting Diode) technology has replaced halogen and incandescent bulbs as the industry standard.

• Efficiency: A standard LED bulb averages 3 to 7 watts, compared to 20 to 35 watts for a halogen bulb with the same light output.
• Longevity: LED bulbs last 20,000 to 40,000 hours—nearly 20 times longer than halogen.
• Safety: LEDs run much cooler, reducing fire risks in dense foliage.
• Retrofitting: If you have an older halogen system, you can easily swap in LED replacement bulbs to instantly lower the load on your transformer.

PRIMARY USES OF LIGHTING

1. Path Lighting: Safe passage along walkways. Avoid the “runway effect” by staggering lights rather than lining them up in straight rows.
2. Well Lighting: Recessed into the ground or rock areas. This hides the light source while illuminating trees or walls from the base.
3. Spotlighting & Highlighting: Adjustable fixtures used for “Up-lighting” prize plants or “Moonlighting” by placing fixtures high in tree canopies.
4. Flood Lighting: Creating broad washes of light over large surfaces like estate walls or home facades.

PLANNING & EQUIPMENT 

1. The Transformer (The Power Hub)
   Choosing the right size (100W, 200W, or 300W) is a simple mathematical process:

• • The Calculation: Add up the total wattage of all bulbs on the line.
    (Example: 10 LED bulbs at 5W each = 50W total load).
  • The 20% Rule: Never max out your transformer. Leave 20% available wattage to prevent overheating and allow for future light additions. 

2. Landscape Wire (The Delivery System)
   Low-voltage wire is measured by “gauge.” The lower the number, the thicker the wire for longer runs.

• • 16-Gauge: Best for small front yards or short runs with few lights.
  • 14 or 12-Gauge: Essential for long runs to the back of the property to ensure the power stays strong (preventing “voltage drop”).

3. Fixtures 

• • Metal: The most durable option for the Southwest sun; hides spots well and lasts for years.
  • Composite/Plastic: Budget-friendly, but may degrade faster in high-UV desert conditions.

 INSTALLATION & MAINTENANCE TIPS

• Use Waterproof Connectors: Do not use the “clip-on” connectors that come with some fixtures. Use grease-filled, waterproof wire nuts to protect against shorts and corrosion.
• Replace Failures Quickly: Even with LEDs, if a bulb fails, replace it promptly. In some systems, a dead bulb can cause an increased electrical load on the remaining bulbs, leading to premature failure of the entire run.
• Clean Your Lenses: Hard water from irrigation can cloud the glass. Wipe lenses periodically to maintain the “shimmer” of your LED lights.

 WATTAGE & CABLE RECOMMENDATIONS

Total Wattage of LED Load	16 Gauge (Max Length)	14 Gauge (Max Length)	12 Gauge (Max Length)
Up to 50 Watts	100 Feet	125 Feet	150 Feet
51 – 100 Watts	75 Feet	100 Feet	150 Feet
101 – 200 Watts	Not Recommended	75 Feet	125 Feet

 Star Pro Tip: Because LEDs use so little wattage, you can often run twice as many lights on a 12-gauge wire than you could with old halogen bulbs!

 For additional help in planning and selecting your landscape lighting system, visit any Star Nursery location and ask for our Irrigation & Lighting Associate.

 Star Nursery, your garden’s partner for every bloomin’ thing!

©2026, Star Nursery, Inc.

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