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LED Lights Attract Significantly Fewer Insects Than Incandescent or Fluorescent Lights
Key points
- Insects use UV light from the moon for navigation.
- Incandescent lights emit UV, attracting insects.
- LED lights do not emit UV, attracting fewer insects.
- 2016 study confirmed LEDs attract fewer insects than other light types.
Observed Decline in Insect Attraction
An observation from Roland Rumm on a WINGS Veracruz trip noted a significant decrease in insects around outdoor LED lights compared to previous incandescent lighting. This change resulted in fewer geckos, which previously fed on the insects attracted to the lights, indicating a direct impact on local wildlife due to the lighting change.
Insect Navigation and Light Wavelengths
Flying insects navigate by orienting themselves so that moonlight, which contains ultraviolet (UV) wavelengths, shines on their backs. Artificial lights that emit UV can mimic moonlight, causing insects to circle or become disoriented. Incandescent lights transmit UV, while LED lights do not, explaining the difference in attraction.
Scientific Confirmation of LED Impact
In 2016, scientists at the University of Bristol conducted experiments comparing insect attraction to incandescent, compact fluorescent, 'cool-white' LED, and 'warm-white' LED lights. The study found that LEDs attracted significantly fewer insects, especially Diptera, than the other light sources. There was no significant difference in attraction between 'cool' and 'warm white' LEDs.
Implications of Widespread LED Adoption
As outdoor lighting transitions from incandescent to LED technology, the reduced attraction of insects to these new light sources has ecological implications. The change affects insect populations around artificial lights and subsequently impacts predators that rely on these insects as a food source.
✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →
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Reporting from
A guide observed that LED lights attract fewer insects compared to older incandescent lights, leading to a decline in insect-eating geckos. Research from the University of Bristol in 2016 confirmed that LEDs attract significantly fewer insects, particularly Diptera, due to their lack of ultraviolet (UV) light emission, which insects use for navigation.