better buy in HK. i have bought some lights in mainland china, installation is not a problem, but broken after several months (actually is big brand Philip), i have called the HK philip lights customer service and they said there are 1 yrs warranty for their lights, however due to the light was bought in mainland china, they passed me to Shanghai philips customer service centre, and the centre said i need to mail them the light for exchange. finally, i stop dealings with it and just bought a new one of hk$450 only (similiar price as in mainland china~ sign)