The move toward more modern, environmentally efficient lighting can play a role in making a facility attractive to pests, such as in the use of exterior lighting at a business. Attracting pests toward a facility makes it more likely they will gain entry into buildings through gaps, cracks and even doors. That doesn’t mean you can’t use lights such as LED lights. However, you need to be sure to select lights that emit a spectrum that does not increase pest attraction. Research shows that LED light emissions less than 550 nanometers may be more attractive to pests than those with higher wavelengths.