The Maxibright Daylight 660W PRO LED uses predominantly LUMLED White LEDs with the addition of some Osram red spectrum to ensure optimum performance throughout the life of the plants.The unit is made up of 6 LED bars connected to the running gear, it is easily installed by one person as the running gear is suspended in position before the new improved clip-on LED bars are connected.At 100% output, the unit delivers 1782 µmol/s which is an overall fixture efficiency of 2.7 µmols/J but it is fully dimmable from 100% down to 25% (without the need to purchase a separate dimmer).iLink compatible, for use with the DAYLIGHT Lighting Controller.Some specifications (from the manufacturer): Consumption: 660W Output (PPF): 1296 µmol/s Fixture efficiency: 2.7 µmols/J Dimensions: 112cm X 107cm Coverage: 1.2m x 1.2m - 1.5 x 1.5m area