Under the Energy Policy and Conservation Act (EPCA), as amended, if the U.S. Department of Energy (DOE”) fails to complete a rulemaking for general service lamps (GSLs”) in accordance with certain statutory criteria, or if a final rule for GSLs does not produce savings that are greater than or equal to the savings from a minimum efficacy standard of 45 lumens per watt (lm/W”), the Secretary of Energy must prohibit the sale of any GSL that does not meet a minimum efficacy standard of 45 Im/W.  This request for information (RFI”) solicits information from the public regarding the availability of lamps that would satisfy a minimum efficacy standard of 45 lm/W, as well other information that may be relevant to a possible implementation of the statutory backstop requirement for GSLs.