Identify common lighting issues and understand whether the fault lies with the fixture, LED source, driver, wiring, or installation.

Light does not turn on ▾
Possible causes
  • No power supply
  • Faulty LED driver
  • Incorrect wiring
  • Defective LED module
  • Incorrect input voltage
How to test
  • Test the power outlet with another device
  • Check live and neutral connections
  • Test using a known working driver
  • Measure voltage with a multimeter
  • Remove dimmers/controllers and test directly
Likely fault: Driver, wiring, or LED module
Light turns on then switches off ▾
Possible causes
  • Driver overheating
  • Driver overload
  • Short circuit
  • Poor ventilation
How to test
  • Switch off and allow the light to cool for 10–15 minutes
  • Check that driver wattage exceeds fixture wattage
  • Inspect wiring for exposed conductors
  • Test without dimmers or controllers
Likely fault: Driver thermal protection
Flickering or blinking light ▾
Possible causes
  • Loose wiring connections
  • Incompatible dimmer or controller
  • Unstable power supply
  • Failing LED driver
How to test
  • Tighten all wiring terminals
  • Remove dimmers/controllers and test directly
  • Test using another driver of the same rating
  • Check voltage stability
Likely fault: Driver or dimmer compatibility
Light is dim or output is weak ▾
Possible causes
  • Incorrect driver output
  • Voltage drop due to long cable runs
  • Incorrect installation
  • LED degradation
How to test
  • Confirm driver output matches product specifications
  • Test with shorter cable runs
  • Compare with an identical working fixture
  • Measure output voltage and current
Likely fault: Driver mismatch or voltage drop
Partial lighting (some LEDs not working) ▾
Possible causes
  • Internal LED module failure
  • Loose internal connections
  • Manufacturing defect
How to test
  • Inspect for dark or burnt LED sections
  • Compare with another unit of the same model
  • Check continuity (qualified person only)
Likely fault: LED module or internal PCB
Overheating or burning smell ▾
Possible causes
  • Incorrect voltage
  • Driver overload
  • Poor heat dissipation
  • Internal short circuit
How to test
  • Turn off power immediately
  • Verify voltage and driver compatibility
  • Inspect for discoloration or melted insulation
  • Do not re-energize until checked
Likely fault: Driver or incorrect installation
Light works intermittently ▾
Possible causes
  • Loose wiring
  • Weak internal connections
  • Temperature-sensitive components
How to test
  • Inspect and tighten all wiring
  • Observe behavior after warm-up
  • Test with a known working driver
Likely fault: Wiring or internal connection
Outdoor light failure / water ingress ▾
Possible causes
  • Incorrect IP rating used
  • Improper sealing during installation
  • Damaged gasket or cable entry
How to test
  • Inspect gaskets, seals, and cable entries
  • Check for moisture inside the fixture
  • Confirm IP rating matches installation zone
Likely fault: Installation or environmental exposure
Safety Notice:
All electrical testing must be carried out by a qualified electrician. Do not open sealed fixtures or drivers.