I-35W bridge LED lighting described in DOE Gateway report
The latest report from the DOE’s Gateway program looks at the first installation of LED lighting on a major interstate thoroughfare in the US.
This Gateway demonstration report provides an overview of initial project results including lighting performance, economic performance, and potential energy savings.
Key findings to date include:
- The LED luminaires provided a notably uniform illumination and offered a conservative 13% energy savings relative to the baseline HPS system.
- Sufficient illumination levels across the wide span of the bridge were more easily met during LED luminaire simulations than with the traditional HPS system.
- The luminaires' 40-foot mounting height and wide coverage area necessitated the use of large LED luminaires with correspondingly high first costs. Simple payback was found to be quite long at current luminaire pricing.
- Overall public reaction to the LED bridge lighting has been very positive, with “positive” comments outweighing “negative” comments by about five-to-one.