When you're comparing quotes from permanent lighting companies in Calgary, voltage is one of the first technical differences you'll notice — if you know to look for it. Starise uses 24V systems. Many competitors use 12V. Most homeowners don't know what that difference means, which is exactly why some companies don't advertise it.

In this guide, we'll explain what voltage does in an LED lighting system, why it matters for real-world performance, and what the difference looks like on a two-storey Calgary home.

What voltage actually does in an LED system

LED lights need consistent electrical current to operate at full brightness. When that current drops — due to wire length, resistance, or connection quality — brightness drops with it. This is called voltage drop.

Here's the key: voltage drop is a fixed physical phenomenon. You can't engineer it away entirely — but you can design around it by starting with higher voltage. The math works like this:

If your wire run loses 2V over 15 meters (a completely normal amount for a residential roofline), a 12V system drops to 10V — an 8% reduction. A 24V system drops to 22V — a 1% reduction. The 24V system delivers nearly identical brightness from the first LED to the last. The 12V system gets noticeably dimmer toward the end of the run.

Simple Rule of Thumb A 12V LED system at the end of a 15m run can lose 15–25% of its brightness. A 24V system loses less than 3% over the same run. The difference is visible to the naked eye, especially on larger homes.

Why this matters for Calgary homes specifically

A typical two-storey Calgary home in communities like Aspen Woods, Tuscany, or Mahogany has 40–70 metres of roofline. That's a lot of wire run — and at 12V, voltage drop becomes significant before you've covered half the home.

12V installers work around this with more power injection points — essentially adding extra power supplies at intervals along the roofline to "reset" the voltage. This works, but it means more hardware, more wiring connections, more potential failure points, and a messier install. It also adds cost.

24V systems cover the same roofline length with fewer injection points because the starting voltage is high enough to sustain consistent brightness across longer runs. Simpler is better.

The full comparison

Factor 12V Systems 24V Systems (Starise)
Max run length (consistent brightness) 5–10 metres 15–20 metres
Power injection points needed Every 5–10m Every 15–20m
Brightness consistency across roofline Visible drop-off on long runs Consistent end-to-end
Heat generation Higher (more current for same power) Lower (efficient power delivery)
Wire gauge required Thicker (higher current) Thinner (lower current)
Connection complexity More connections needed Fewer connections
Safety Low voltage (safe) Low voltage (safe)
Used by Starise No Yes

What about safety?

Both 12V and 24V are "low voltage" systems — well below the 50V threshold where electrical shock becomes a serious hazard. Neither system requires a licensed electrician for the LED portion of the install (though the connection to your home's 120V service does). Safety is not a meaningful differentiator between 12V and 24V for residential applications.

Heat and efficiency

For the same light output, a 24V system draws less current than a 12V system. Less current means less heat in the wiring. Less heat means less energy wasted and longer lifespan for both the wire and the connectors.

On a full-home install running for several hours every evening, this efficiency difference adds up. 24V systems are typically 10–15% more efficient than comparable 12V systems — a modest but real energy saving over the life of the product.

Why do some companies still use 12V?

Mainly cost. 12V LED strips are more widely manufactured and often cheaper to source. Some companies have built their entire product line around 12V and haven't updated it. Others use 12V because it allows them to undercut on price, accepting the trade-off in performance.

For homeowners on a budget who have a smaller home with short roofline runs, a well-installed 12V system can still look great. The voltage drop issue only becomes obvious on longer runs — typically anything over 10 metres.

For Calgary homes — where rooflines are often 40–80 metres total — 24V is the right engineering choice.

Frequently asked questions

Is 24V permanent lighting safe for a home?
Yes. 24V is considered extra-low voltage (ELV) and is safe to touch even with wet hands. It's the same voltage range used for garden lighting, automotive systems, and security cameras. The connection from your home's 120V service to the power supply is handled by our licensed electrician and is fully compliant with Alberta Electrical Code.
Can I tell by looking at lights whether they're 12V or 24V?
Not directly. But you can often see the effect: look at a 12V system on a long roofline run and compare the brightness at the beginning of the run versus the end. If there's a noticeable difference, that's voltage drop at work. A properly installed 24V system should look equally bright from end to end.
Does higher voltage mean higher electricity bills?
No — in fact, the opposite. For equivalent light output, 24V systems consume less power than 12V systems because they're delivering power more efficiently. Your electricity bill is determined by wattage (power) consumed, not voltage.
Do other permanent lighting companies in Calgary use 12V?
Some do. When getting quotes, simply ask the company what voltage their system runs at. If they can't answer or don't know, that's a red flag. See our full comparison guide for more questions to ask before you buy.

See what 24V looks like on your home

We'll come out, measure your roofline, and show you what consistent brightness looks like end-to-end on a full demonstration. Calgary-wide quotes are free.

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