noun
bug zapper; electric insect killer; light trap
A device that uses light to attract and then electrocute or trap flying insects. Common in homes, restaurants, and outdoor areas.
夏になると、殺虫灯をベランダに置く。
In summer, I put a bug zapper on the balcony.
レストランの入り口に殺虫灯が設置されている
A bug zapper is installed at the entrance of the restaurant.
General insect repellent (spray, net, etc.), whereas 殺虫灯 is a specific electric device that kills insects.
Compound of 殺虫 (さっちゅう, 'insect killing') and 灯 (とう, 'light'). The term directly describes a light that kills insects.