CFR›Title 10›Chapter II›Part 431›Subpart P ContainsSections 431.281–431.282; Subject group Energy Conservation StandardsCorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Subpart P—Mercury Vapor Lamp Ballasts Contents 431.281 § 431.281 Purpose and scope. 431.282 § 431.282 Definitions concerning mercury vapor lamp ballasts. Energy Conservation Standards Energy Conservation Standards Section 431.286 Source70 FR 60418, Oct. 18, 2005, unless otherwise noted. Previous O Subpart O—Commercial Prerinse Spray Valves Next Q Subpart Q—Refrigerated Bottled or Canned Beverage Vending Machines