"Basic Types Of Lighting". Lighting Fundamentals. American Lighting Association. Archived from the original on 20 ஜூன் 2015. Retrieved 19 June 2015. {{cite web}}: Check date values in: |archive-date= (help)
"Basic Types Of Lighting". Lighting Fundamentals. American Lighting Association. Archived from the original on 20 ஜூன் 2015. Retrieved 19 June 2015. {{cite web}}: Check date values in: |archive-date= (help)