I bought 2 Yeelight Jiaoyue 450 online and after installation, found that one of the light will goes off after some time can could not be turn on and it comes back on intermittently. The re-seller only offers 7 days warranty and i only installed the product after a month after delivery so its likely he wun honor an exchange. it certainly seems like a hardware issue. I stayed in Singapore. What are the options i have?