Line Voltage vs. Low Voltage Lighting: What’s the Difference and Which is Right for Your Home?

Jul 16, 2025

When it comes to lighting your home, most homeowners don’t think twice about the voltage behind the switch. However, understanding the difference between line voltage and low-voltage lighting can help you make smarter, more cost-effective, and even safer choices, especially when it comes to renovations or outdoor installations.

From energy efficiency to safety and style, each option has its strengths and trade-offs. So, how do you know which is best for your space? The expert electricians at AJ’s Electrical have broken it down for you. 

What Is Line Voltage Lighting?

Line voltage lighting operates at 120 volts, the standard for most residential homes in Canada. Since it connects directly to your home’s electrical system, there’s no need for a transformer, making installation straightforward for most indoor settings.

Pros:

  • Standardized and widely compatible
  • No transformer needed
  • Ideal for high-load lighting (kitchens, living rooms, etc.)

Cons:

  • Typically uses more energy
  • Larger fixtures are required due to higher currents
  • Greater risk of electric shock if the wiring is exposed

What Is Low Voltage Lighting?

Low voltage systems run on 12 or 24 volts, which requires a transformer to reduce the standard 120 volts coming from your home. These systems are often used in accent lighting, landscape lighting, or task-specific fixtures like under-cabinet lights.

Pros:

  • Energy-efficient
  • Lower power usage can result in long-term cost savings.
  • Smaller, more flexible fixture designs due to reduced filament and current requirements.
  • Lower risk of electric shock, ideal for outdoor and damp environments.
  • Easier to move, especially in outdoor setups where wires don’t need to be buried in conduit.

Cons:

  • Requires a transformer, which adds installation complexity.
  • Voltage drop can occur if the system is overextended.
  • You can’t run as many lights from one transformer as you could with line voltage.
  • Transformers may eventually require replacement.

Myths and Modern Realities

In the past, low voltage lighting was seen as brighter or sharper, and often claimed to have a longer lifespan. However, modern technology has blurred these lines. Today’s fixtures, whether low or line voltage, can deliver comparable quality and longevity, making function and placement more important deciding factors than ever before.

Which One Is Right for Your Home?

Choosing between line and low voltage comes down to your lighting goals, location, and long-term plans:

  • Want bright, full-room illumination indoors? Line voltage is likely the better fit.
  • Designing a flexible outdoor setup or looking for energy savings? Low voltage offers serious perks.
  • Concerned about safety in moisture-prone areas like gardens or bathrooms? Low voltage is a safer bet.

Understanding the difference between line voltage and low voltage lighting doesn’t just help you choose a fixture, it helps you design a space that’s smarter, safer, and more efficient. Whether you’re remodelling your kitchen or upgrading your backyard, the right lighting setup can enhance your home’s function and style for years to come.

If you’re still unsure? Reach out to the expert electricians at AJ’s Electrical, and we’ll answer all the questions you have and walk you through the process of choosing the best fit for your home.

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