[faraday28]

2200pf/630V cap is for limiting current, it's pretty much weird because reminds me of some cheapo Driverless LED Lamp.

you can't change it to lower value because the cap would be hot enough because the current drawn too large for the value and the lamp may not turn on.. and the voltage rating should be same or more. Most green film cap only rated 100V, you must double check the rated voltage. Use polypropylene cap.