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Basis of Presentation and Summary of Significant Accounting Policies - Product Warranties (Details)
3 Months Ended 18 Months Ended 60 Months Ended
Mar. 31, 2016
Mar. 31, 2021
Mar. 31, 2021
Commercial LEDFL Tubular LED Lamps (Excluding Battery Backup TLED), Troffer Luminaires, And Certain Globe Lights      
Product Warranty Liability [Line Items]      
Warranty service periods     10 years
Other LED Products      
Product Warranty Liability [Line Items]      
Warranty service periods   5 years 5 years
LEDFL Tubular LED Lamps (Excluding Red Caps)      
Product Warranty Liability [Line Items]      
Warranty service periods   10 years  
Minimum      
Product Warranty Liability [Line Items]      
Warranty service periods 1 year    
Minimum | D-Series Lamps      
Product Warranty Liability [Line Items]      
Warranty service periods   5 years  
Maximum      
Product Warranty Liability [Line Items]      
Warranty service periods 5 years    
Maximum | D-Series Lamps      
Product Warranty Liability [Line Items]      
Warranty service periods   10 years