Sara Willey of Barbizon's Boston office send over a really cool link for the US DOE's Solid State Lighting Gateway project.
The site shares the results of completed solid-state lighting (SSL) GATEWAY demonstration projects, publishing detailed reports and briefs on completed projects, both available as Adobe Acrobat PDFs. These reports include detailed analysis of data collected, projected energy savings, payback analysis, and user feedback.
Completed project profiles include: Museums, Roadways, Retail, Open Spaces and others. It's definitely worth taking a peek at if you are considering a SSL retrofit or upgrade.