Most of the current USAF
heavies have converted to a combination red/white upper and lower strobe. The only extra set the KC
-10 has is the wing tip strobes. On a standard, non formation, good weather scenario we light everything up like a Christmas tree. If we had big neon signs that said "TEXACO" we would use them too. During poor weather we will use the upper/lower in red only, to reduce the glare from clouds. For Air Refueling we turn off the wing tips and lower beacon to keep from blinding the receiver, and as PW4084 said, they make it much easier to find us in the soup.