Hillmann DiBernardo Leiter Castelli Inc. (HDLC) is one of the most experienced and highly regarded firms in architectural lighting design. We are a New York Corporation with Founding Principals in lighting design practice since 1961. The company continues in its tradition of providing architectural lighting design at a high level of design, service, and technical proficiency.

We are a collaborative, pro-active member of the design team that works to integrate visually appropriate and technically sound lighting solutions into the total design. Our multi-disciplinary background has afforded us to successfully participate in a wide variety of project types.