- Darby Lighting & Electronic Design, Inc.
 - Custom lighting, electronic design, and home automation for residential and commercial construction. - Energy Concepts & Controls, Inc.
- Design, construction, and consulting firm for energy efficient lighting systems.
- FMS Lighting Management Systems
- Energy management company provides installation and maintenance of lighting systems to businesses, industries, and institutions. Serving Miss. and neighbouring states.
- LighTec, Inc.
- Designs, specifies, installs, and maintains commercial and residential lighting systems in New England.
- Lighting Services, Inc.
- Provides sales of emergency lighting systems and maintenance, installation, and design of lighting and energy use systems to facilities throughout southern New England.
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