Federal Register - October 25, 2021
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Source: Federal Register
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Federal Register / Vol. 86, No. 203 / Monday, October 25, 2021 / Rules and Regulations TABLE IV.8250 W REPRESENTATIVE UNITS
Equipment class
150 W and 250 W
EL
EL1
EL2
Technology
Rated wattage
Starting method
Input voltage
250
250
Pulse
Pulse
Quad
Tri
More Efficient Magnetic Electronic Max Tech
System input power 278.7
266.2
Ballast efficiency 0.904
0.939
Excludes 150 W fixtures initially exempted by EISA 2007, which are fixtures rated only for 150 watt lamps; rated for use in wet locations, as specified by the NFPA 702002, section 410.4A; and containing a ballast that is rated to operate at ambient air temperatures above 50 C, as specified by UL 10292007.
TABLE IV.9400 W REPRESENTATIVE UNITS
Equipment class >250 W and 500 W
EL
EL1
EL2
Technology
Rated wattage
Starting method
Input voltage
400
400
Pulse
Pulse
Quad
Tri
More Efficient Magnetic Electronic Max Tech
System input power 440.5
426.0
Ballast efficiency 0.908
0.939
TABLE IV.101000 W REPRESENTATIVE UNITS
Equipment class >500 W and 1,000 W
EL
EL1
Technology
Rated wattage
Starting method
Input voltage
1000
Pulse
Quad
More Efficient Magnetic
System input power 1063.8
Ballast efficiency 0.94
TABLE IV.111500 W REPRESENTATIVE UNITS
Equipment Class >1,000 W and 2,000 W
EL
EL1
Technology
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Based on the more-efficient ballasts selected for analysis, DOE develops ELs for the representative equipment classes. DOE defines a max-tech efficiency level to represent the maximum possible efficiency for a given product.
In the August 2020 NOPD DOE
identified one magnetic EL in every equipment class. The more-efficient magnetic EL represents a magnetic ballast with a higher grade of steel compared to the baseline. DOE
identified a second EL an electronic EL
for the 150 W and 250 W and >250
W and 500 W equipment classes. The standard electronic level represents a ballast with standard electronic circuitry. DOE identified a third EL a more efficient electronic EL in the 50
W and 100 W and >100 W and <150
W equipment classes. The moreefficient electronic EL represents an electronic ballast with an improved circuit design and/or more efficient components compared to the standard electronic level. 85 FR 47472, 47487
47488.
DOE received several comments regarding the ELs proposed in the August 2020 NOPD.
NEMA stated that DOE had not adequately explained the basis for changing efficiency equations from the previous rulemaking. NEMA stated that the modifications to the equations resulted in efficiency levels inconsistent
16:11 Oct 22, 2021
Jkt 256001
Starting Method
Input Voltage
1500
Probe
Quad
More Efficient Magnetic
4. Efficiency Levels
VerDate Sep<11>2014
Rated Wattage
with DOEs intent. NEMA, No. 12 at p.
2
Current MHLF standards specify power-law equations for ballasts operating lamps with rated wattages 50
W and 500 W and linear equations for ballasts operating lamps with rated wattages >500 W and 1,000 W. Using MHLF efficiency data DOE determined that the current equation forms remain valid. DOE modified only the coefficients and exponents of the equations to best fit the MHLF
efficiency data while forming one continuous equation across equipment classes, where possible. In this final determination, DOE maintains the equations put forth in the August 2020
NOPD but makes minor adjustments, detailed in the paragraphs below, to the proposed coefficients and exponents to allow the most efficient products to meet max tech.
For the 50 W and 100 W equipment class tested at voltages other than 480 V
NEMA stated that EL 1 and EL 2
appeared feasible but would require stretching the technological capability.
NEMA stated that EL 3 for this equipment class may be achievable but would require physical size changes that would render the product incompatible with the existing fixture form factor. NEMA stated DOE should modify EL 1 and EL 2 according to current product capabilities and eliminate EL 3 for this equipment class.
NEMA, No. 12 at p. 2 Signify stated that for the ballasts in the 50 W and
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System input power 1600.9
Ballast efficiency 0.937
100 W tested at voltages other than 480
V equipment class the minimum efficiency requirement would increase by 0.10 at the proposed EL 3. This would require a ballast to operate a 70
W lamp at an efficiency higher than 0.90. Signify stated that a 0.90 ballast efficiency requirement would be higher than DOEs current efficiency requirement for an external power supply, a device that is simpler with less stages than an electronic ballast.
Signify stated it is difficult to explain how a ballast with the same power as an external power supply would have a higher efficiency and still preserve the necessary form factor. Signify, No. 13 at pp. 810
DOE identified ballasts in DOEs compliance certification database that are in the 50 W and 100 W tested at voltages other than 480 V equipment class and meet the proposed EL 3 for this equipment class. These ballasts included models that operate 70 W
lamps. Because there are products that meet the max tech level, DOE is not adjusting ELs proposed for this equipment class in this final determination.
For the >100 W and <150 W
equipment classes for all voltages, NEMA stated that EL 3 was unrealistically high for ballasts tested at 480 V 88.9 percent versus the current 82 percent requirement and as high as 90.9 percent for ballasts tested at voltages other than 480 V. NEMA stated that based on its review of DOEs
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