the CREE LED bulbs are situated on a cylindrical stem where the light emitters are on the shaft. There are no emitters on the tip. So when you turn on the light, and look directly at it, there is a dark spot in the middle of the light bulb. It is more noticeable in the low lumen bulbs. Why did CREE put it on the side? LED emitters focus much like a spot light, and putting it on the sides gives their bulbs an incandescent imitation.
I don't know why they didn't add emitters on the tip to conceal the black spot.
If you are putting LED bulbs into a recess lighting area, don't use CREE as the light emits sideways and not down. Most other LED bulbs emit downward.