Brian, I took the photo with the switch turned on but it won't show in the photos.
When Brian, Wilf and I were going to the Coe Hill parade we stopped for a coffee and I was wearing this hat. I couldn't figure out what the lump in the side was for. We found a little switch and it turned out to be a battery for the flashing lights in the front, behind the letters. Dirk gave me this hat a couple of years ago and this is the first I noticed.
This seems to fit in with the headlamps on the bumper. Dutch stuff has lights in unusual places.
Bob I was afraid to say anything about
PINK in case it was your family colours or just your preference. 
Cheers,
Barry