... . Certificates: CE,ROHS,UL 4. Power factor: 90 led cup light bulb 9WSpecification:Item No: BDL-Q31E27A9W1-BWattage: 9w Length: 177mm ... , No UV or RF interference, Patented heat sink and optical diffuser, longer than incandescent & fluorescents. No mercury, no ballast required and ... -house, shop, hotel, meeting room, showroom and more. led cup light bulb 9W