We bought the umbrella and the light switch did not work properly - it went off when the umbrella was open.  So we followed the warranty instructions and sent it to Yanosan Group  18323 Bothell-everett Hwy #310, Mill Creek, Washington, United States.  It was returned with a "wrong address" note from the post office.  I found the Bright Night website on the internet,and called the phone number, but no one answers.  I googled the Yanosan Group and found their business listing with another phone number and the above address, this time the phone was answered, but they said it was the wrong number.  I sent them an email, and have not heard back.  They must be out of business.

So don't buy this unless you are willing to fix it yourself - and it is a cheap chinese umbrella with a cheap lightbulb - 1950s quality.