120V, 277V & 480V: A Voltage Guide for Commercial Lighting
Residential lighting runs on 120V, but commercial and industrial buildings often run 277V or 480V, and using the wrong fixture wastes money or simply will not work. This guide explains the differences and where each belongs.
Smaller spaces run 120V or 208 to 240V; larger commercial buildings run 277V; heavy industrial often runs 480V. Many PrimeLights fixtures are multi-volt, and 480V models are available for plant power.
The Common Voltages
- 120V: homes, small shops, garages.
- 208 to 277V: most commercial buildings.
- 480V: large industrial and manufacturing.
Why It Matters
Higher voltage reduces current for the same power, which means smaller wire and less loss across big facilities. Running fixtures at the building's native voltage avoids extra transformers.
Choosing Fixtures
Confirm your building voltage with an electrician, then pick matching fixtures. For plants on 480V, see 480V lighting and the manufacturing guide.
Match the Building's Power
We carry multi-volt and 480V fixtures for any commercial or industrial system.
Shop 480V Lighting Call (512) 843-1383Last updated: June 2026. Consult local codes and a licensed professional for your specific project.
