Metal halide lamp ballasts and fixtures.

(a) Sampling plan for selection of units for testing. (1) The requirements of § 429.11 are applicable to metal halide lamp ballasts; and (2) For each basic model of metal halide lamp ballast selected for testing, a sample of sufficient size, not less than four, shall be selected at random and tested to ensure that: (i) Any represented value of estimated energy efficiency calculated as the measured output power to the lamp divided by the measured input power to the ballast (P out /P in ), of a basic model is less than or equal to the lower of: (A) The mean of the sample, where: Or, (B) The lower 99-percent confidence limit (LCL) of the true mean divided by 0.99. And x is the sample mean; s is the sample standard deviation; n is the number of samples; and t 0.99 is the t statistic for a 99% two-tailed confidence interval with n-1 degrees of freedom (from appendix A). (b) Certification reports. (1) The requirements of § 429.12 are applicable to metal halide lamp ballasts; and (2) Pursuant to § 429.12(b)(13), a certification report shall include the following public product-specific information: The minimum ballast efficiency in percent (%), the lamp wattage in watts (W), and the type of ballast ( e.g., pulse-start, magnetic probe-start, and non-pulse start electronic). [76 FR 12451, Mar. 7, 2011; 76 FR 24780, May 2, 2011; 76 FR 46202, Aug. 2, 2011]