I have used all of these bulbs to replace burnt out bulbs in 4 connected string lights that have been in my garden for years. They shined well. I was happy, but a few days later, and now not a single light is on on my 4 garlands. The outlet is fine and working, but my light no longer works. I can't think of any other reason why they would suddenly not work and I'm not sure which bulbs are new and which are old to take out. Super screwed up. That's the $80 cost of the garlands.