You need to open it up and get the specs off the drivers first. If its one of those chinese cob lights, its actual draw is probably around 120 watts? so likely only will run one or two good cobs. but we need the driver info to answer this. That also mean the heasink is only good for up to the actual draw of the current chips. You might be able to run 3 CXA 2530 or 3 Citizen 1212 chips ( I need to check the actual part # for the 1212 )