You said you were trying to upgrade from cheap Chinese junk. What you don’t want to do is buy more cheap Chinese junk. A good cob light is usually a citizen, cree or vero powered light. You have to be cautious about the version cobs in the lights too. The ones that say they are powered by Cree are more difficult to buy since cree has many versions and most lights on amazon or eBay are using very old tech cobs. Any cob that is square or pink will not be an upgrade from the cheaper leds you have now.