http://www.brainpop.com/science/energy/light/preview.weml
https://www.ies.org/lighting/science/https://www.youtube.com/watch?v=gtgBHsSzCPE
http://studyjams.scholastic.com/studyjams/jams/science/energy-light-sound/light.htm
http://www.optics4kids.org/home/kids/
http://www.learner.org/teacherslab/science/light/color/dots/index.html
https://www.ies.org/lighting/science/
https://solarpower.guide/students-guide-to-solar-energy
https://www.ies.org/lighting/science/https://www.youtube.com/watch?v=gtgBHsSzCPE
http://studyjams.scholastic.com/studyjams/jams/science/energy-light-sound/light.htm
http://www.optics4kids.org/home/kids/
http://www.learner.org/teacherslab/science/light/color/dots/index.html
https://www.ies.org/lighting/science/
https://solarpower.guide/students-guide-to-solar-energy