Below are some links to useful information about LED lighting technology.
Philips Online Lighting University (requires login)
Topics covered: LEDs and Trends, Myths about LEDs, Principle of LED, Principles of LED Systems, Applications for Indoor Functional and Architectural.
Topics covered: Lighting Terms, Lighting Technologies, Designing with Light, Standards and Policies
General questions about LEDs and lighting in a fun game form.
Not strictly about LEDs, but this is a superb educational and instructional video series on electronics. Show the kids. A must-watch for LM employees.
A pdf explaining lumen maintenance, published by Philips Lumiled division.
A pdf explaining LED testing, published by US Dept of Energy.