Power Surges and Dimming

Lights dim when the AC kicks on. The TV flickers during spring storms. A surge took out your garage door opener last year. Power quality problems are a way of life in North Texas — but most homeowners don’t know which ones are the utility’s fault, which are the house’s, and which are quietly destroying their electronics. Let’s sort it out.

Dimming: Where It Comes From

Brief dim when a big motor starts (AC compressor, well pump): a small, momentary sag is normal — motors draw inrush current. If the dimming is dramatic or lights stay dim while the appliance runs, your service or a shared circuit is undersized.
Dimming throughout the house at random times: could be a failing service neutral — the same defect behind severe flickering. This one can destroy appliances and needs same-day attention.
Dimming on one circuit only: overloaded branch circuit or a loose connection heating up under load.

Surges: The Silent Electronics Killer

A surge is a momentary voltage spike. The dramatic ones come from lightning — and DFW sits in one of the most active thunderstorm corridors in the country. But the everyday ones come from inside your own home and the grid itself: motors switching off, utility grid switching, a neighbor’s welder. Small surges don’t kill your TV instantly; they erode semiconductor junctions over months. Then one day the smart fridge board, garage opener, and mesh router all act up and nobody connects the dots.

The Two-Layer Defense We Install

Layer 1 — whole-home surge protection (SPD) at the panel: clamps big external surges before they enter branch wiring. Current electrical code requires SPDs on new and replaced panels, and we include them in every panel upgrade.
Layer 2 — point-of-use protection: quality plug-in protectors for electronics, sized by joule rating, replaced after major events. The $8 power strip from the checkout aisle is not surge protection.

For homes in storm-prone corridors — we’re looking at you, Frisco, McKinney, and Denton — pairing an SPD with a standby generator covers both the spike and the outage that usually follows.

When to Call Us

Call promptly if dimming is house-wide, if you’ve lost electronics to more than one “mystery failure,” or if flickering/dimming started suddenly. Our electricians measure voltage under load, inspect the service entrance and neutral, and thermal-scan the panel. If the problem is on the utility side, we document it so your report to Oncor gets action. If it’s inside, we fix it — with flat pricing and a 10-year workmanship warranty. Storm-damage calls go straight to our 24/7 emergency line; also see electrical problems after a storm.

Frequently Asked Questions

Do whole-home surge protectors really work?

Yes — a properly installed Type 2 SPD clamps surges in nanoseconds and protects everything downstream. It won’t survive a direct lightning strike to the house (nothing will), but it handles the vastly more common nearby-strike and grid-switching surges.

Why do my lights dim only in summer?

Summer is peak load: your AC cycles constantly and the whole neighborhood’s demand sags the grid. If dimming is severe, your service conductors or panel may be at capacity — worth an inspection before it becomes a failure in August.

Protect what’s plugged in. Call Bright Way Electrical Contracting at (817) 932-1099 or request a free estimate for whole-home surge protection anywhere in Dallas–Fort Worth.