Outdoor Lighting Problems
Common issues with security lights, garden lighting, and outdoor electrics
Solutions Ltd
Devon's Climate Challenge
Our damp, salt-laden air is particularly hard on outdoor electrics. Quality IP-rated fittings and professional installation are essential for reliable outdoor lighting in the South West.
Common Outdoor Lighting Problems
Outdoor lighting faces challenges that indoor electrics don't - weather, temperature changes, and exposure to the elements. Most outdoor lighting problems stem from water ingress, poor-quality fittings, or age-related wear.
Problems & Solutions
Outdoor lights keep tripping the RCD
Cause: Water ingress, damaged cable, or faulty light fitting causing earth leakage.
Solution: Check all outdoor connections and fittings for moisture damage. Replace any damaged components with properly IP-rated equipment.
Security light not coming on
Cause: Sensor fault, incorrect sensitivity settings, or blown bulb/failed LED driver.
Solution: Check/adjust sensor settings first. Clean sensor lens. If still failing, sensor or driver may need replacement.
PIR sensor triggers randomly
Cause: Sensor detecting heat from cars, animals, plants, or heating vents. Could also be insects or condensation on lens.
Solution: Adjust sensitivity and coverage area. Clean lens. Reposition to avoid heat sources and vegetation.
Lights corroded or full of water
Cause: Inadequate IP rating for location, seal failure, or installation damage.
Solution: Replace with appropriately rated outdoor fittings (IP65 minimum for exposed locations). Ensure proper sealing at cable entry.
Garden lights intermittent or dim
Cause: Corroded connections, voltage drop on long cable runs, or aged transformers on low-voltage systems.
Solution: Inspect and clean all connections. Check transformer output. Consider upgrading to mains-voltage LED fittings.
Tips for Reliable Outdoor Lighting
Use IP65-rated fittings minimum
Higher IP ratings (IP67+) for ground-level or very exposed locations
Invest in quality brands
Cheap outdoor lights rarely last - quality fittings are more economical long-term
Professional installation matters
Correct cable routing, junction boxes, and sealing prevents most problems
Regular maintenance
Annual inspection of connections and seals catches problems before failure
Frequently Asked Questions
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Outdoor Lighting Experts
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Frequently Asked Questions
What IP rating do outdoor lights need?
For outdoor use, IP44 is the minimum for sheltered areas like porches. IP65 is recommended for exposed locations like garden lights and security lights. IP67 or higher is needed for in-ground fittings or pond lights. The first digit (4-6) indicates dust protection; the second (4-7) indicates water protection.
Why do my outdoor lights keep tripping the circuit?
Water ingress is the most common cause. Devon's damp climate means outdoor electrical equipment takes a beating. Check fittings for water inside, corroded terminals, and damaged cable sheath. Even tiny amounts of moisture can cause RCD trips. Replace damaged items with quality IP65+ rated fittings.
Can I install outdoor lights myself?
Simple replacements of like-for-like fittings are possible if you're competent. However, installing new outdoor circuits, adding sockets or switches, or anything requiring buried cables is notifiable work under Part P and should be done by a registered electrician who can certify the work.
How do I fix a security light that's always on?
Most PIR security lights have manual override options - switching quickly off and on puts many into 'always on' mode. Try switching off for 30 seconds to reset. If stuck on, the sensor may be faulty (common after power surges or age). Check also for spiders/insects in the sensor housing.