Housing: Aluminum+PMMA; Mounting ring: white; Installation: recessed, surface mounted, suspend;(need corresponding accessories) Dimensions: 595×595×9mm; Ceiling cutouts: 585×585mm; Beam angle: 120°; Lamp(s): LED; Power: 40W; Efficacy：100Lm/w; Total luminous flux of luminaire: 4000lm; Power Factor: 0.95; Mains voltage: 220-240V/50-60Hz; Colour temperature: 6500K; Colour rendering: Ra80; UGR: 22; IP/IK Grade: IP20/IP44(IP44 only front); Class of protection II; Control System: on/off Service life: 30,000h at 70% luminous flux;