Highly efficient LED luminaire insert LINEAtrack with CRI>92 has 158 Lm/Watt Fastest attachment thanks to integrated track adapter Environmentally friendly reuse of your existing mounting rail system Flexible phase selection and power adjustment directly in the luminaire Long service life thanks to oversized cooling and decoupled, replaceable power supply Adjustable performance thanks to POWERselect 42W@6650 Lm = 158 Lm/Watt 50W@7840 Lm = 157 Lm/Watt 59W@9180 Lm = 156 Lm/Watt