Principal Industries describes itself as a provider of LED solutions for brand imaging through signage and architectural illumination, organised as five brands under one group, one of which is SloanLED. Its products are used by sign manufacturers to light channel letters, cabinets and branded facades.
The group is headquartered on Venture Drive in San Angelo, Texas, and keeps weekday business hours on Central time. Inquiries go through the contact page, by phone or by email.

