Family member of this series: 4 inch MAX 15W, 6 inch MAX 30W and 8 inch MAX 50W.made by die-cast aluminium ADC12, surface powder coated in white ,black or silver three different colors; different beam angle for option, speical design with dark light technology which makes the UGR≤15， while the lumen output can reach 90lm/W. it can fit with different brands of COB and Driver, such as Philips, Luminus, Cree, Citizen and so on.Its originally designed mainly for hotel corridors, with dark light but ground is bright. also can be used in the restanrant and varies of buildings. Optional TRIAC, 1-10V Dimmable Or DALI Dimmable.