About Penumbra Controls

Penumbra Controls is at the forefront of lighting and lighting controls solutions, offering unparalleled expertise to a broad spectrum of clients including manufacturers, sales representatives, dealers, builders, and lighting designers. With a commitment to quality, Penumbra specializes in developing lighting and lighting control solutions and workflows.

The mission of Penumbra Controls is to help you provide high quality education, clear documentation, and effective project management. Penumbra provides comprehensive support throughout the lifecycle of each project—from initial concept and design through implementation and beyond. With years of experience in lighting and lighting control technologies, Penumbra can help elevate your next project.

  • Manufacturers can utilize technical expertise needed to develop products that stand out in the competitive market.

  • Sales representatives benefit from detailed product knowledge and training, equipping them with the tools to effectively communicate the advantages of their systems.

  • Dealers and Builders receive guidance in procurement and client servicing, ensuring a seamless project completion with customer satisfaction.

  • Lighting designers find a collaborative partner in Penumbra Controls, with access to innovative controls solutions and documentation that bring their creative visions to life.

Penumbra Controls is dedicated to pushing the boundaries of what lighting and lighting controls can achieve, providing state-of-the-art solutions that not only meet but exceed the expectations of its clients. Join Penumbra Controls as it sets the stage for the future of lighting and lighting controls where creativity and technology come together to provide extraordinary experiences.

What is a Penumbra?

A Penumbra is the enchanting space between full shadow and full light, experienced during a solar eclipse.

Why Penumbra? Just as the penumbra is a part of this transformation from the ordinary to the extraordinary, Penumbra Controls plays a key role in advancing the success of lighting and lighting controls. Lighting controls play a crucial role in lighting and the future of our planet, but we have yet to realize their full potential. Penumbra Controls is dedicated to elevating lighting and lighting controls to their highest capabilities.

Join Penumbra Controls in transforming spaces, sculpting experiences, and lighting up your world!

C. Webster Marsh

C. “Webster” Marsh is the Owner of Penumbra Controls, where he provides lighting and lighting controls design, specification guidance, and education. Webster brings over 20 years of applied experience with lighting and lighting controls, and he enjoys sharing his wealth of knowledge with the lighting and lighting controls industry.

Webster is a Certified Lighting Controls Practitioner (CLCP), Lighting Controls Association contributor, instructor for the Southern California Edison Energy Education Centers, member of the Lighting Agora, member of the IESNA, and past speaker for Lightfair, IES Annual Conference, LEDucation, and NYControlled.

In his spare time, Webster is a contributor to the Lighting Controls Association's educational resources and co-hosts the Lighting Controls Podcast.