The bulbs can overheat during use, posing a hearth hazard. The 120-volt LED bulbs, bought as 6- 8- and 9-watt bulbs (equivalent to 40 or 50 watts), had been marketed beneath the brand names Definity, EcoSmart, Sylvania and Westinghouse. The model numbers A19, G25 and R20/PAR20 are found on the packaging and on the sunshine-colored circular neck above the base of the bulb the place the date code can be printed. The date code displays the week and yr of manufacture; for example date code L4010 was produced throughout the 40th week of 2010. The date codes listed under may have the letters "CH " or "MX " at the top. For instance, date code L4010 may appear as L4010CH or L4010MX. Consumers should instantly remove the bulbs from sockets and lamps and phone Light Science Group for alternative bulbs. EcoLight home lighting Science Group is conscious of sixty eight incidents of product failures, eight of which were accompanied by visible smoke or fire conditions.