10 CFR § 429.26 - Fluorescent lamp ballasts.

---
identifier: "/us/cfr/t10/s429.26"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "10 CFR § 429.26 - Fluorescent lamp ballasts."
title_number: 10
title_name: "Energy"
section_number: "429.26"
section_name: "Fluorescent lamp ballasts."
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: "2026-04-05"
last_updated: "2026-04-05"
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"
---


# 429.26 Fluorescent lamp ballasts.

(a) *Sampling plan for selection of units for testing.* (1) The requirements of § 429.11 are applicable to fluorescent lamp ballasts; and

(2) For each basic model of fluorescent lamp ballasts, a sample of sufficient size, not less than four, shall be randomly selected and tested to ensure that—

(i) Any represented value of the energy consumption of a basic model for which consumers would favor lower values shall be greater than or equal to the higher of:

(A) The mean of the sample, where:

Or,

(B) The upper 99 percent confidence limit (UCL) of the true mean divided by 1.01, where:

and

(ii) Any represented value of the ballast luminous efficiency, power factor, or other measure of the energy efficiency or energy consumption of a basic model for which consumers would favor a higher value must be 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, where:

(iii) The represented value of average total lamp arc power must be equal to the mean of the sample,

Where:

x
 is the sample mean;

n is the number of units in the sample; and

x<sub>i</sub> is the i<sub>th</sub> unit.

(b) *Certification reports.* (1) The requirements of § 429.12 are applicable to fluorescent lamp ballasts; and

(2) Pursuant to § 429.12(b)(13), a certification report must include the following public product-specific information: The ballast luminous efficiency, the average total lamp arc power, the power factor, the number of lamps operated by the ballast, and the type of lamps operated by the ballast (*i.e.,* wattage, base, shape, diameter, and length).

(c) *Rounding requirements.* (1) Round ballast luminous efficiency to the nearest thousandths place.

(2) Round power factor to the nearest hundredths place.

(3) Round average total lamp arc power to the nearest tenth of a watt.

[76 FR 12451, Mar. 7, 2011; 76 FR 24769, May 2, 2011, as amended at 81 FR 25600, Apr. 29, 2016; 85 FR 56493, Sept. 14, 2020]