What lighting scheme is most likely to attract insects to a building?

The lighting scheme that is most likely to attract insects to a building involves bright white lights, such as flood lights shining on a white wall. Insects are particularly attracted to lights that emit bright, white wavelengths, as these lights mimic the natural light of the moon, which many insects rely on for navigation. The high intensity of flood lights can also increase visibility in the surrounding area, drawing insects in from a distance.

In contrast, soft yellow lights are less attractive to insects because they emit a spectrum that is less appealing to many flying species. Similarly, dim red lights are also less likely to attract insects, as many bugs are not able to see these wavelengths. Solar-powered garden lights tend to be minimal in brightness and often use warm tones, which further reduces their appeal to insects. Thus, the use of flood lights, particularly against a reflective surface like a white wall, creates an environment that is most inviting to insects.