@book{4989,
	author = {Lenk, Ron and Lenk , Carol},
	title = {Practical Lighting Design With LEDs /},
	publisher = {John Wiley & Sons,},
	year = {c 2011.},
	address = {Hoboken, New Jersey :},
	note = {Includes Index.},
	url = {https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/9781118008218?download=true}
}