WARNING - 5630 LED strip lights are burning out!

I have many 5630 LED strip lights that have burned out after only 2 months of use.  Here is what they look like now that they have been replaced:

I used these LED strips to replace the five foot flouresent light bulbs in a street sign.  Here are the bad LED's as they were starting to burn up.  By the time I replaced them many more had burned out.