Is there an absolute guarantee, they will last 20 years?
Also do they have clear lights, and not as big, for outdoor use?
Heck if I pay $2 for a roll of 100 lights at my local K-Mart or Wal-Mart, which are in stock and no waiting for the mailman or UPS man, what is the advantage of going with your suggestion, other than feeling superior and overloading an already overloaded mail system which has personal and petinent gifts in the pipeline, while I wait for the "quality" lights.