Green Guru LLC Irrigation & Landscape Lighting

Stop Repeat Lighting Failures

Fix Lights Out, Flicker, and Dim Runs at the Root Cause

Most lighting repairs fail because only the symptom gets replaced. A new lamp or fixture won’t solve recurring flicker when the real issue is voltage drop, splice corrosion, or a stressed transformer leg.

Our repair process isolates the actual failure path first, then fixes it cleanly. We test transformer behavior, trace runs, rebuild waterproof splices, and document what matters so the next service visit is faster and predictable.

Root-cause diagnostics first Voltage-drop correction path Waterproof splice rebuilds Damaged cable location + repair Rochester, MI area

Jump to: Common failuresLighting FAQsFast help.

More: UpgradesDesign & installationLighting guide

Quick Answer: Why do landscape lights keep failing?

Usually because the root cause was never corrected. Common drivers are corroded splices, voltage drop on long runs, overloaded transformer legs, and damaged cable. We diagnose first, then repair the failure path so problems stop repeating.

Patch the Symptom vs. Repair the Cause

Comparison of symptom-based lighting repairs versus root-cause repair diagnostics.
Symptom-Only Repair Root-Cause Repair Path
Replace failed fixture only Verify transformer load, tap, and control behavior
Retwist old splice and bury Rebuild waterproof splice with moisture discipline
Ignore dim-at-end symptoms Measure voltage and rebalance runs
Treat outages as random Trace cable path and isolate recurring fault points
No future service baseline Document findings for faster follow-up

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Why lighting repairs repeat (and how we stop that)

Most "lights out" and "dim at the end" calls come down to transformer taps, voltage drop, and corrosion at splices. We diagnose the driver and repair the right point in the system.

Prevents

Repeat outages and callbacks

We rebuild weak connections and damaged cable so fixes hold through wet soil and Michigan freeze/thaw cycles.

Restores

Consistent brightness across runs

We diagnose voltage drop and rebalance runs so end-of-line fixtures do not stay dim or unstable.

Improves

Future service speed and clarity

We reduce "mystery" issues by making splices, taps, and routing easier to find and service later.

How service works

  • 1

    Verify power & control

    We start at the transformer: load, taps, timer/photocell behavior, and obvious failures.

  • 2

    Locate the failure

    Voltage checks and run tracing point to the real cause: splice corrosion, damage, or drop.

  • 3

    Repair & rebuild

    We rebuild connections with waterproof splice discipline and restore cable integrity.

  • 4

    Test & document

    We confirm performance and note what matters for future service and upgrades.

Common repair calls we handle

Lights out or flickering

  • Loose or corroded splice
  • Failed lamp, socket, or fixture lead
  • Transformer overload, bad tap, or failing control

Dim at the end (voltage drop)

  • Wire gauge too small for run length
  • Too many fixtures on one run
  • Runs need rebalancing (T/hub method)

Wiring damage (critter / shovel / aeration)

We locate damaged cable, replace sections, and rebuild splices with moisture protection. If your system is older, we can also map the runs so future repairs are faster.

Pro tip: Many “mystery” lighting failures are a single corroded splice or nicked cable that only fails when soil is wet.

What affects price

  • Fixture count + layout: number of connection points and distance from the transformer.
  • Access: mulch beds vs. dense roots/hedges vs. hardscape edges.
  • Root cause: a single splice is quick; voltage drop rebalancing is more involved.
  • Controls: timer/photocell issues can be a simple swap or a broader control upgrade.

If a repair turns into a modernization opportunity, we’ll confirm scope before proceeding.

Related product guides

Lighting Repair FAQs

Why are my landscape lights flickering?

Flicker usually traces back to corroded splices, loose fixture leads, failing lamps, transformer control faults, or unstable voltage under load. We test transformer-to-fixture to isolate the real cause.

Why are lights dim at the end of the run?

This is usually voltage drop from long runs, undersized cable, or too many fixtures on one leg. We verify voltage and rebalance run strategy where needed.

Do you repair systems installed by other companies?

Yes. We service existing low-voltage lighting systems and diagnose root cause before proposing repair or upgrade scope.

Can you find and repair cut underground cable?

Yes. We trace damaged cable sections, replace where needed, and rebuild connections with waterproof splice discipline.

Do I always need to replace my transformer?

No. Many failures are splice, cable, fixture, or control related. We test transformer condition, load, and tap configuration before recommending replacement.

What causes underground lighting splices to fail?

Moisture intrusion and corrosion are the most common causes. Poor splice protection often creates intermittent failures that worsen after rain.

How long do lighting repairs usually take?

It depends on access, layout complexity, and root cause. Single-splice or fixture fixes are often faster than run tracing or voltage-drop rebalancing.

Can you fix timer, photocell, and smart-control issues?

Yes. We troubleshoot transformer controls and can recommend targeted control upgrades when existing hardware is unreliable.

Do you publish fixed pricing for lighting repairs?

Lighting repairs are service-scoped on-site because price depends on fixture count, cable path complexity, access conditions, and root cause.

Can you upgrade part of my system without replacing everything?

Often, yes. We can repair failed sections, improve run balance, and update controls while keeping components that still perform well.

Do you offer 24-hour response for lighting failures?

The Lighting Service Plan includes a 24-hour response commitment (contact and dispatch window) for on-call requests. Completion timing can still depend on parts, weather, and access.

What should I check before booking a repair?

Note which fixtures are out, whether failures are intermittent, and if behavior changes after rain. Those clues help isolate control, splice, and cable issues faster.

Next step

Book lighting service for a clean diagnosis and fix path, or request a free inspection if you are planning a bigger upgrade. If you want ongoing coverage, compare the Lighting Service Plan for 24-hour on-call response.

Fast help

Most lighting problems come down to transformer taps, voltage drop, corrosion at splices, or damaged cable. We can diagnose quickly and recommend the cleanest fix path.

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Also see: Upgrades and Design & installation.