According to 10 CFR 430.2 [Title 10 – Energy; Chapter II -- Department of Energy; Subchapter D -- Energy Conservation; Part 430 -- Energy Conservation Program for Consumer Products; Subpart A -- General Provisions], the term appliance lamp means “any lamp that --
(1) Is specifically designed to operate in a household appliance, has a maximum wattage of 40 watts, is sold at retail (including an oven lamp, refrigerator lamp, and vacuum cleaner lamp); and
(2) Is designated and marketed for the intended application, with
(i) The designation on the lamp packaging; and
(ii) Marketing materials that identify the lamp as being for appliance use.