Hmmm, that might be part of it. I think it is just more noticeable on those larger fan leaves, that just so happen to be next to the lights at this point. I've progressively cut off the ones below as they were beginning to yellow and die off, but they showed the same characteristics.

They are CFLs, so I would hope they aren't getting too hot. I don't have a fan in there for circulation, so it I'm not going to rule it out.