Does epoxy color determine emitted light color?
No, but it will appear somewhat brighter. The eye can detect an increase or decrease in light only when its intensity is doubled. In applications that use many LEDs in close proximity, the intensity of the devices should be closely matched to provide visual uniformity. A good rule to follow is: the dimmest device should be no more than half as bright as the brightest LED. Greater disparity is detectable as bright and dim spots.