Linear Replacement Lamps

Testing & Reporting Requirements for Linear Replacement Lamps

DLC defines all tube-style LED products that use the lamp holders (i.e. sockets or tombstones) in the luminaire to mechanically or electrically connect to the fixture housing and electric supply to fall under these testing requirements. Products that do not employ lamp holders will be classified as Retrofit Kits, regardless of form factor. Please see the Product Eligibility page and Technical Requirements for more details on product classification.

DLC accepts QPL applications for Two- and Four-Foot Linear Replacement Lamps and U-Bend Linear Replacement Lamps. The testing and reporting requirements described below are intended to evaluate the performance both of the lamp itself, and its performance in an appropriate reference troffer, the most common application for fluorescent replacement lamps.
 



Supporting Documentation Requirements

Applications for Linear Replacement Lamps must provide the following supporting documentation in addition to the standard test data required for all applications.

  • Installation Instructions
    Installation instruction sheets must be submitted with the application to indicate how the replacement lamp will be installed in an existing fixture in the field. This must be provided in addition to all necessary documentation required for other product categories. Lamps that require specialized components in order for installation to perform to the above criteria are not eligible for qualification. Lamps that employ rotatable end-caps are eligible, but must clearly indicate this feature in the product spec sheet.

 



Testing Requirements
 

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Lamp-Level Tests

Fixture-Level Tests: Four-Foot Linear Replacement Lamps

Fixture Level Tests: Two-Foot Linear Replacement Lamps

Fixture-Level Tests: U-Bend Replacement Lamps
 



Lamp-Level Tests
 

All lamps seeking DLC qualification must test the bare lamp according to LM-79.
 

Table 7: Individual Replacement Lamp Criteria
  Four-Foot Lamps Two-Foot Lamps
System Efficacy ≥ 110 lm/W ≥ 110 lm/W
Initial Light Output ≥ 1,600 lm ≥ 800 lm
Correlated Color Temperature ≤ 5000K ≤ 5000K
Color Rendering Index (CRI) ≥ 80 ≥ 80
Power Factor ≥ 0.90 ≥ 0.90
Total Harmonic Distortion ≤ 20% ≤ 20%
Warranty ≥ 5 Years ≥ 5 Years

 

Testing Notes

For Replacement Lamps designed to operate off existing fluorescent ballasts, testing must be conducted using a standard 0.88 ballast factor, electronic instant-start ballast. Specification sheets for the ballasts used during testing must be provided with the application and the ballast make and model number must be noted in the test report.

For lamp-style retrofit kits (i.e. products connecting mechanically and electrically via lamp holders, but which require an electrical modification to the existing fixture to bypass the existing ballast), "lamp"-level testing is also required. If the system is designed to operate multiple lamps off an external driver, the driver should be loaded as it would be in the field, with appropriate steps taken to calculate the efficacy of the single lamp. For example, for a two-lamp kit, one lamp should be measured for light output, while the system as intended (with two identical lamps on the driver) should be measured for electrical input. The wattage into the driver can then be divided by two, and that wattage divided into the lamp lumens to determine system efficacy.
 



Fixture-Level Tests for Four-Foot Linear Replacement Lamps
 

All lamps seeking qualification must be tested inside a reference troffer. Type A, Type B, and dual mode four-foot lamps shall test with two (2) lamps installed in an appropriate reference troffer. Type C lamps shall test with the appropriate number of lamps as are intended to be operated on the external driver included in that Type C system; 2–, 3–, and 4–lamp Type C systems are eligible.

The reference troffer may be any of the following, or a pre-approved equivalent.

  • Lithonia 2GT8 lensed 2x4
  • Lithonia 2PM3N 12 cell 2x4 parabolic
  • Columbia Lighting lensed 4PS24
  • Columbia Lighting P224 12 cell parabolic
  • Pre-approved equivalent
    • A.L.P. EL-2x4-23-* (*= # of lamps)
    • Lithonia 2SP8 G 2 32 A12 XXXX XX XXXX
    • Texas Flourescents 131-A-4-32-E120
    • Columbia Lighting 4PS24
    • Monmouth Lighting Corp DCP 22
    • Simkar Corporation TY Lensed Troffer 2x4
    • Juno Lighting Group S2x4BL
    • LSI GA 2x4
    • Columbia Lighting JT824
    • Visioneering Corp. ERCTB 2x4
    • US Energy Sciences YTR-04-7
    • Philips Day-Brite 2SPG232-FS01-UNV-1/2EB
Pre-approved Equivalents

DLC does not endorse or exclude any particular make or model of reference fixture. Options listed are intended to illustrate common fixtures of the appropriate type. Manufacturers may test in alternative fixtures to those listed, with pre-approval from the DLC. Pre-approved fixtures must meet the following conditions:

  • Alternative fixtures must be commonly used in the application category intended to be applied for. Documentation may be required to demonstrate fixtures appropriate use if questions arise.
  • Alternative fixtures must provide similar thermal environments to those listed. Particularly, alternative fixtures may not be significantly different in internal volume or construction materials.
     
Table 8: In-situ Testing Requirements: Four-Foot Linear Replacement Lamps
 
In-situ Lamp Criteria for Four-Foot Linear Replacement Lamps
Luminaire Efficacy ≥ 100 lm/W
Minimum Initial Luminaire Light Output

2 lamps installed: 3,000 lm

3 lamps installed: 4,500 lm

4 lamps installed: 6,000 lm

Spacing Criteria

Spacing Criteria:

0-180° = 1.0 - 2.0

90-270° = 1.0 - 2.0

Zonal Lumen Distribution:

0-60°: ≥ 75%

Lumen Maintenance L70 50,000 hours

 

Lumen Maintenance
  • LM-80 for the package/module/array (6,000 hours minimum)
  • In-situ Temperature Measurement Test (ISTMT) in selected Reference Luminaire with two (2) identical lamps (only one is required to have thermocouple(s) attached)
  • TM-21 Calculator, appropriately filled out (www.energystar.gov/tm21calculator)
     
Testing Notes

For Replacement Lamps designed to operate off existing fluorescent ballasts, testing must be conducted using a standard 0.88 ballast factor, electronic instant-start ballast. Specification sheets for the ballasts used during testing must be provided with the application, and the ballast make and model number must be noted in the test report.

Replacement Lamps that utilize rotatable end caps should be tested in the orientation specified as the default in the manufacturer’s installation instructions. If the installation instructions do not specify an orientation, the lamps should be oriented “straight down” (this is commonly the “zero degree” setting). DLC reviewers will review the installation instructions provided with the application to verify the appropriate testing orientation, and compare this against documentation in the LM-79 report and IES file. Rotatable end cap linear replacement lamp listings will include information on the testing orientation in the Notes field.
 



Fixture Level Tests: Two-Foot Linear Replacement Lamps


All lamps seeking qualification must be tested inside in a reference troffer. Type A, Type B, and dual mode two-foot lamps shall test with three (3) lamps installed in an appropriate reference troffer. Type C lamps shall test with the appropriate number of lamps as are intended to be operated on the external driver included in that Type C system; 2–, 3–, and 4–lamp Type C systems are eligible.

The reference troffer may be any of the following, or a pre-approved equivalent.

  • Lithonia 2GT8 lensed 2x2
  • Lithonia 2SP8 lensed 2x2
  • Lithonia 2PM3 9 cell 2x2 parabolic
  • Columbia Lighting lensed 4PS22
  • Columbia Lighting P222 9 cell parabolic
  • Pre-approved equivalent
    • A.L.P. EL-2x2-20-* (*= # of lamps)
    • Texas Fluorescents 131-A-2-32U-E120
    • Monmouth Lighting Corp RF24
    • Simkar Corporation TY Lensed Troffer 2x2
    • Juno Lighting Group S2x2BL
    • LSI LA/FLA 2x2
    • Columbia Lighting JT822
    • Visioneering Corp. ERCTB 2x2
    • US Energy Sciences YTR-02-5
Pre-approved Equivalents

DLC does not endorse or exclude any particular make or model of reference fixture. Options listed are intended to illustrate common fixtures of the appropriate type. Manufacturers may test in alternative fixtures to those listed, with pre-approval from the DLC. Pre-approved fixtures must meet the following conditions:

  • Alternative fixtures must be commonly used in the application category intended to be applied for. Documentation may be required to demonstrate fixtures appropriate use if questions arise.
  • Alternative fixtures must provide similar thermal environments to those listed. Particularly, alternative fixtures may not be significantly different in internal volume or construction materials.
     
Table 9: In-situ Testing Requirements: Two-Foot Linear Replacement Lamps
 
In-situ Lamp Criteria for Two-Foot Linear Replacement Lamps
Luminaire Efficacy ≥ 100 lm/W
Minimum Initial Luminaire Light Output

2 lamps installed: 1,350 lm

3 lamps installed: 2,000 lm

4 lamps installed: 2,700 lm

Spacing Criteria

Spacing Criteria:

0-180° = 1.0 - 2.0

90-270° = 1.0 - 2.0

Zonal Lumen Distribution:

0-60°: ≥ 75%

Lumen Maintenance L70 50,000 hours

 

Lumen Maintenance
  • LM-80 for the package/module/array (6,000 hours minimum)
  • In-situ Temperature Measurement Test (ISTMT) in selected Reference Luminaire with three (3) identical lamps (only one is required to have thermocouple(s) attached)
  • TM-21 Calculator, appropriately filled out (www.energystar.gov/tm21calculator)
     
Testing Notes

For Replacement Lamps designed to operate off existing fluorescent ballasts, testing must be conducted using a standard 0.88 ballast factor, electronic instant-start ballast. Specification sheets for the ballasts used during testing must be provided with the application and the ballast make and model number must be noted in the test report.

Replacement Lamps that utilize rotatable end caps should be tested in the orientation specified as the default in the manufacturer’s installation instructions. If the installation instructions do not specify an orientation, the lamps should be oriented “straight down” (this is commonly the “zero degree” setting). DLC reviewers will review the installation instructions provided with the application to verify the appropriate testing orientation, and compare this against documentation in the LM-79 report and IES file. Rotatable end cap linear replacement lamp listings will include information on the testing orientation in the Notes field.
 



Fixture Level Tests: U-bend Replacement Lamps
 

All lamps seeking qualification must be tested inside in a reference troffer. Type A, Type B, and dual mode U-bend lamps shall test with two (2) lamps installed in an appropriate reference troffer.

The reference troffer may be any of the following, or a pre-approved equivalent.

  • Lithonia 2GT8 lensed 2x2
  • Lithonia 2SP8 lensed 2x2
  • Lithonia 2PM3 9 cell 2x2 parabolic
  • Columbia Lighting lensed 4PS22
  • Columbia Lighting P222 9 cell parabolic
  • Pre-approved equivalent
    • A.L.P. EL-2x2-20-* (*= # of lamps)
    • Texas Fluorescents 131-A-2-32U-E120
    • Monmouth Lighting Corp RF24
    • Simkar Corporation TY Lensed Troffer 2x2
    • Juno Lighting Group S2x2BL
    • LSI LA/FLA 2x2
    • Columbia Lighting JT822
    • Visioneering Corp. ERCTB 2x2
    • US Energy Sciences YTR-02-5
Pre-approved Equivalents

DLC does not endorse or exclude any particular make or model of reference fixture. Options listed are intended to illustrate common fixtures of the appropriate type. Manufacturers may test in alternative fixtures to those listed, with pre-approval from the DLC. Pre-approved fixtures must meet the following conditions:

  • Alternative fixtures must be commonly used in the application category intended to be applied for. Documentation may be required to demonstrate fixtures appropriate use if questions arise.
  • Alternative fixtures must provide similar thermal environments to those listed. Particularly, alternative fixtures may not be significantly different in internal volume or construction materials.
     
Table 10: In-situ Testing Requirements: U-Bend Replacement Lamps
 
In-situ Lamp Criteria for U-Bend Replacement Lamps
Luminaire Efficacy ≥ 100 lm/W
Minimum Initial Luminaire Light Output

2 lamps installed: 2,500 lm

3 lamps installed: 3,750 lm

Spacing Criteria

Spacing Criteria:

0-180° = 1.0 - 2.0

90-270° = 1.0 - 2.0

Zonal Lumen Distribution:

0-60°: ≥ 75%

Lumen Maintenance L70 50,000 hours

 

Lumen Maintenance
  • LM-80 for the package/module/array (6,000 hours minimum)
  • In-situ Temperature Measurement Test (ISTMT) in selected Reference Luminaire with two (2) identical lamps (only one is required to have thermocouple(s) attached)
  • TM-21 Calculator, appropriately filled out (www.energystar.gov/tm21calculator)
     
Testing Notes

For Replacement Lamps designed to operate off existing fluorescent ballasts, testing must be conducted using a standard 0.88 ballast factor, electronic instant-start ballast. Specification sheets for the ballasts used during testing must be provided with the application and the ballast make and model number must be noted in the test report.