Designed for optimal life and lumen maintenance, the LF4 is a 4" architectural LED downlight with color consistency from fixture to fixture. Light Engine utilizes Philips Fortimo LED module and provides controlled color consistency. Universal 120-277V high efficiency LED driver with 0-10V dimming standard. Photometrics tested per IESNA-LM-79-2008 standards. Minimum 50,000 hours at 70% lumen maintenance. 5-year warranty.