Triac dimming compatible, and integrated with LED linear module(s) to provide high illumination performance. Long service life of >50,000 hours L70 @ 45ºC. JIS and IEC safety and EMC compliance. Mounting Method : 4 mounting brackets, Hole cut out: 638 X 211mm (2FT), 1247 x 211 (4FT). Diffuser material: PMMA (Polymethylmethacrylate) ice crystal, Housing material: Zinc coated steel, Powder coated white. Flexible wiring, Heat resistant up to 105°C. Protection Class : IP44 in conjunction with ceiling. Available equipped type with “Battery backup system or “Emergency lighting”, if required.