---
kind: "section"
citation: "10 C.F.R. § 429.54"
title: "10"
number: "429.54"
heading: "Metal halide lamp ballasts and fixtures."
url: "https://uscodex.org/cfr/10/429.54"
---

# §429.54. Metal halide lamp ballasts and fixtures.

- (a) **Sampling plan for selection of units for testing.**
  - (1) The requirements of [§ 429.11](/cfr/10/429.11.md) 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 (Pout/Pin), of a basic model is less than or equal to the lower of:
      - (A) **The mean of the sample, where—**
      - (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 t0.99 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](/cfr/10/429.12.md) are applicable to metal halide lamp ballasts; and
  - (2) Pursuant to [§ 429.12(b)(13)](/cfr/10/429.12.md?p=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).

## Notes

### Amendments

[76 FR 12451, Mar. 7, 2011; 76 FR 24780, May 2, 2011; 76 FR 46202, Aug. 2, 2011]

### Authority

Authority: 42 U.S.C. 6291-6317; 28 U.S.C. 2461 note.

### Source

Source: 76 FR 12451, Mar. 7, 2011, unless otherwise noted.

### Amendments

[76 FR 12451, Mar. 7, 2011; 76 FR 24780, May 2, 2011; 76 FR 46202, Aug. 2, 2011]