Lights Out is a water-based pesticide developed especially to control bed bugs. When applied as directed on the labeling,Lights Out will kill bed bugs on contact.It is third party certified for effectivenesswith 100% mortality occuring within 5-10 minutes of application, depending on life stage. Lights Out is also effective on other insects, cockroaches, ants, millipedes, carpet beetles, and fleas. Any of the listed insects coming into contact with a surface treated with Lights Out will be killed for up to 30 days after application.