Hybrid Lighting
- http://www.ornl.gov/sci/solar/
- Development of hybrid lighting systems using alternatively solar light through fiber optics or electrical light, at Oak Ridge National Laboratory.
VTT daylight
- http://www.vtt.fi/rte/bp/daylight/index.html
- The Technical Research Centre of Finland offers information about consulting services, reference projects, conservation issues for museums and galleries, and images of lighting simulations.