Philips EvoKit LED Retrofit kit is an energy efficient LED alternative to traditional linear fluorescent troffers. Designed for use with standard grid or narrow grid ceiling T-Grids. under 4 minutes in existing luminaire without the need to break the ceiling plenum. Constructed using galvanized steel which helps fight rust and makes for more durable product. 0 to 10 V dimming satisfies universal voltage requirements. Mark10 leading edge dimming offers ability to dim without pulling neutral wires making it compatible with more existing systems. Step dimming to 40%.