White 18W 4000K 1800 lm 25,000 hrs IP20Aluminium constructionMultiple low power LED array: even, shadow free diffused light outputInstant start to full illuminationUnobtrusive design with neutral white trimHole cut out size: 210mm4000K colour temperature: for neutral white appearanceTechnical SpecificationLuminaire lumens (with diffuser): 1800 lmLumens from chip (no diffuser): 2340 lmUseful lumens: 1600 lmRated Wattage: 18WRated luminous flux: 1600 lmNominal life time of the lamp: 25,000 hrsColour temperature: 4000KNumber of switching cycles before premature lamp failure: 15,000Warm-up time up to 60 % of the full light output: 0.5Lumen maintenance factor at end of nominal life: >70%Starting time: