LED lighting uses light-emitting diodes as the light source. It has become the standard for parking garages and lots because it uses far less energy than the high-intensity discharge and fluorescent lighting it replaced, lasts much longer, turns on instantly and can be dimmed.
Because LEDs are directional, fixtures can put light where it is needed with less waste upward or sideways, which helps control glare and light pollution. Their ability to dim makes them the natural partner for occupancy and daylight controls, which multiply the savings.
What to specify
- Optics and distribution suited to low garage ceilings or tall lot poles, with attention to glare. See glare.
- Color temperature suited to the setting; warmer light is favored near homes and under dark-sky ordinances.
- Controls for occupancy dimming and daylight response. See adaptive lighting.
- Rated life and warranty, including the driver, which often fails before the LEDs do.
- Light levels that meet recommended practice. See IES RP-8.
The Parkonomics view
LED retrofits are among the most reliable investments in parking: lower energy and maintenance, better light, and data from connected controls. The savings depend on controls and on not over-lighting, so specify both.
Related terms: Adaptive Lighting, Lighting Power Density, Metal Halide Lighting, Glare, Illuminance