CSIL’s recent research publication, The Lighting Fixtures Market in the United States (July 2018, 190 pages, EUR 1,600), estimated that consumption of luminaires few at an average annual rate of 4.6% between 2012 and 2017, resulting in a $20 billion industry. Other conclusions:

• Over 65% of lighting sales is handled by 50 companies.
• Nearly half of lighting is imported.
• LED share is now 65%.

http://www.lightnowblog.com/2019/01/csil-pegs-us-luminaire-market-at-20-billion/