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