The 120-volt LED bulbs, sold as 6- 8- and 9-watt bulbs (equivalent to 40 or 50 watts), were marketed under the brand names Definity, EcoSmart, Sylvania and Westinghouse. The model numbers A19, G25 and R20/PAR20 are found on the packaging and on the light-colored circular neck above the base of the bulb where the date code is also printed. The date code reflects the week and year of manufacture; for example date code L4010 was produced during the 40th week of 2010. The date codes listed below may have the letters "CH " or "MX " at the end. For example, date code L4010 can also appear as L4010CH or L4010MX.
Lighting Science Group is aware of 68 incidents of product failures, eight of which were accompanied by visible smoke or fire conditions. The incidents include damage to light sockets, melted fixtures, burned rugs/carpet/ floors, damage to a circuit and to a lamp. There have been no reports of personal injuries.
For more information and a list of date codes visit here: http://www.cpsc.gov/en/Recalls/2013/L ... y-Lighting-Science-Group/