HESCO/RLS specializes in surge protection for the traffic signal, residential/light industrial, and highway lighting industries. We are also one of the only companies in our industry who manufacture exclusively in the United States and one of the first companies in the country to get ISO 9001:2015 certification, assuring quality products that meet statutory and regulatory requirements. All of our employees are IPC certified and highly skilled at inspecting and assembling PC boards. We are a trusted source for your surge protection requirements.