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10 CFR § 429.54 - Metal halide lamp ballasts and fixtures. 

---
identifier: "/us/cfr/t10/s429.54"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "10 CFR § 429.54 - Metal halide lamp ballasts and fixtures."
title_number: 10
title_name: "Energy"
section_number: "429.54"
section_name: "Metal halide lamp ballasts and fixtures."
chapter_name: "DEPARTMENT OF ENERGY"
subchapter_number: "D"
subchapter_name: "ENERGY CONSERVATION"
part_number: "429"
part_name: "CERTIFICATION, COMPLIANCE, AND ENFORCEMENT FOR CONSUMER PRODUCTS AND COMMERCIAL AND INDUSTRIAL EQUIPMENT"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 6291-6317; 28 U.S.C. 2461 note."
regulatory_source: "76 FR 12451, Mar. 7, 2011, unless otherwise noted."
cfr_part: "429"
---

# 429.54 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<sub>out</sub>/P<sub>in</sub>), 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<sub>0.99</sub> 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]