The MicroBrite DF196 Series Dark Field ring lights deliver focused, medium angle illumination on target. As with the DF198 Series, they are available in multiple diameters and offer an RGB option. The DF196 Series lights differ from the DF198 Series in that they were designed to be placed at a set working distance, providing a focused, fixed-size spot on target. As is typical of Dark Field ring lights, the DF196 lights are best suited for enhancing surface contrast based on topography changes, edges and also surface defects, particualrly on specular reflective surfaces.