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Federal Register / Vol. 86, No. 203 / Monday, October 25, 2021 / Rules and Regulations industry structure, 3 existing efficiency programs, 4 shipments information, 5 market and industry trends, and 6 technologies or design options that could improve the energy efficiency of MHLFs. The key findings of DOEs market assessment are summarized in the following sections.
See chapter 3 of the final determination TSD for further discussion of the market and technology assessment.
1. Scope of Coverage MHLF is defined as a light fixture for general lighting application designed to be operated with a metal halide lamp and a ballast for a metal halide lamp. 42
U.S.C. 629164; 10 CFR 431.322. Any equipment meeting the definition of MHLF is included in DOEs scope of coverage, though all equipment within the scope of coverage may not be subject to standards.
Signify stated that it appreciated the clarification in the August 2020 NOPD
that DOE has does not have authority to evaluate amended standards for metal halide ballasts sold outside of MHLFs as this is a frequent question asked by its customers. Signify, No. 13 at p. 13
2. Test Procedure The current test procedure for MHLFs appears in 10 CFR 431.324 and specifies the ballast efficiency calculation as lamp output power divided by the ballast input power. With regards to the max-tech levels in the August 2020
NOPD, Signify questioned the certification data for any ballast operating a MH lamp at a frequency higher than 400 hertz Hz. Signify stated that the current DOE test
procedure references ANSI C82.6
2015R2020 9 which excludes from scope ballasts that operate at higher than 400 Hz for high-intensity discharge HID lamps. Therefore, energy efficiencies for ballasts operating at frequencies higher than 400 Hz may have been reported to DOE in error.
Signify explained that a test setup specific to high-frequency ballasts is needed as these ballasts are more susceptible to high-frequency parasitic elements among wires and means of interconnections and require the appropriate power supply impedance to prevent the injection of high-frequency voltage components. Hence, Signify suggested that DOE not adopt the maxtech efficiency levels for electronic ballasts until the test method is amended to include accurate measurements of high-frequency electronic MH lamp ballasts. Signify, No. 13 at pp. 910
The 2015 version and the 2015R2020 10 version of ANSI C82.6
do state that their procedures apply to low-frequency ballasts i.e., ballasts that operate at less than 400 Hz. DOEs current test procedure for MHLFs references the 2005 version of ANSI
C82.6 which does not explicitly exclude certain ballasts. In 2017, ANSI
published ANSI C82.172017, High Frequency HF Electronic Ballasts for Metal Halide Lamps, which addressed HF electronic metal halide ballasts with sinusoidal lamp operating current frequencies above 40 kilohertz. ANSI
C82.172017 also states in section 5.1
that all measurements necessary to determine compliance with the ballast performance requirements of this
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standard shall be made in accordance with ANSI C82.6. In the July 2021
NOPR DOE tentatively determined that based on its initial review, the specifications, and instructions in ANSI
C82.6 cover the necessary methodology, while being general enough to be used as a guide for taking measurements for HF electronic ballasts. 86 FR 37069, 37078.
3. Equipment Classes When evaluating and establishing energy conservation standards, DOE
may divide covered products into product classes by the type of energy used, or by capacity or other performance-related features that justify a different standard. 42 U.S.C. 6295q In making a determination whether capacity or another performance-related feature justifies a different standard, DOE must consider such factors as the utility of the feature to the consumer and other factors DOE deems appropriate. Id.
In the August 2020 NOPD, DOE
reviewed metal halide lamp fixtures and the ballasts contained within them to identify performance-related features that could potentially justify a separate equipment class. DOE proposed to maintain the current equipment classes which are based on input voltage, rated lamp wattage, and designation for indoor versus outdoor application. 85
FR 47472, 4748247483. DOE received no comments on this topic and maintains the current equipment classes in this final determination.
The equipment classes considered in this final determination are shown in Table IV.1.

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TABLE IV.1EQUIPMENT CLASSES
Designed to be operated with lamps of the following rated lamp wattage
Indoor/outdoor
50 W and 100 W
50 W and 100 W
50 W and 100 W
50 W and 100 W
>100 W and <150 W
>100 W and <150 W
>100 W and <150 W
>100 W and <150 W
150 W and 250 W
150 W and 250 W
150 W and 250 W
150 W and 250 W
>250 W and 500 W
>250 W and 500 W
>250 W and 500 W
>250 W and 500 W
>500 W and 1,000 W
>500 W and 1,000 W

Indoor
Indoor
Outdoor
Outdoor
Indoor
Indoor
Outdoor
Outdoor
Indoor
Indoor
Outdoor
Outdoor
Indoor
Indoor
Outdoor
Outdoor
Indoor
Indoor

9 American National Standards Institute.
American National Standard for Lamp ballasts Ballasts for High-Intensity Discharge Lamps
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Methods of Measurement. Approved March 20, 2020.

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Input voltage type
Tested at 480
All others.
Tested at 480
All others.
Tested at 480
All others.
Tested at 480
All others.
Tested at 480
All others.
Tested at 480
All others.
Tested at 480
All others.
Tested at 480
All others.
Tested at 480
All others.

V.
V.
V.
V.
V.
V.
V.
V.
V.

10 There are no differences between the 2015R2020 and 2015 versions of ANSI C82.6. The 2015R2020 version is reaffirmation of the 2015
version.

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