http://www.searchreslt.com/rope-light/

Why does my Rope Light turn red?
I have a loft bed from Ikea and have put some rope light on the bars underneath. The problem is after a few months they have started to turn red, like the plastic is melting or something. I have experienced this in other situations and I am curious what causes it and how to prevent/reverse it. Thanks!
maybe use bulbs that are less wattage to prevent it
Rope Light.