ANSI (American National Standards Institute) and IES(Illuminating Engineering Society of North America) officially released the latest version of the IES LM-79-19 standard in May 2019, it will replace the LM-79-08 version. LISUN interpreted the new standard as follows:
1. Test Environment (4.2.1 / 4.3 / 4.7 on Page 2 / Page 3 / Page 4 of the standard)
1.1 Ambient Temperature：25℃±1.2℃
1.2 Humidity: 10%-65%
1.3 Airflow: 0.2m/s
2. Test Circuit Requirements (5.2.1 on Page 4 of the standard): Power supply request4-terminal connection, 2- terminal power supply, 2- terminal feedback
3. AC Power Supply (5.1.2 on page 4 of the standard)
3.1 Load regulation rate: ±0.2%
3.2 Accuracy requirements: 0.1% (reading) + 0.1% (range)
3.3 Example: If the power supply of lamp is 220V and the range is 300V, the actual output voltage should be 220V ± 0.26V
LISUN LSP-500VAR Pure Sine Wave AC Power Source fully meet the requirement, click here to learn more about it.
4. DC Power Supply (5.1.3 on Page 4 of the standard)
4.1 Load regulation rate: ±0.2%
4.2 Accuracy requirements: Current and voltage are both 0.1%
LISUN DC3010 Digital CC and CV DC Power Supply fully meet the requirement, click here to learn more about it.
5. AC Power Meters (5.3.2 on Page 5 of the Standard, 5.3.4 on Page 5 of the Standard)
5.1 Sampling frequency : 1kHz-100kHz
5.2 The meter shall have an expanded uncertainty (k=2) of 0.6% or less for measurement frequencies ranging from 0.5Hz to 1kHz, and an expanded unvertainty (k=2) of 2.0% or less for measurement frequencies ranging from 1kHz to 100kHz
5.3 Total Harmonic Distortion Measurement 2~50 times
LISUN LS2050 Digital Power Meter fully meet the requirement. Click here to learn more about it.
6. Photometric probe (7.3.2 on Page 9 of the Standard）
6.1 Cosine angular responsivity f2(ε,φ) less than 2%
6.2 f1’ less than 3%
7. Spectroradiometer (7.3.2 on Page 9 of standard)
7.1 380-780nm
7.2 Bandwidth not greater than 5nm
7.3 Wevelength unvertainty within 0.5nm
7.4 Sensitivity: Refer to LM-78-17 (7.2 on Page 7 of standard)
LISUN LPCE-2 High Precision Spectroradiometer Integrating Sphere System fully meet the requierment, click here to learn more about it.
LPCE-2(LMS 9000) Spectrophotometer & Integrating Sphere Test System
8. Goniometer variable angle tester (7.3.3 on Page 9 of standard)
8.1 For lamps with beam angle < 20°: 100%-50% maximum luminous intensity choose no more than 1 degree angular resolution; 50%-10% maximum luminous intensity choose no more than 2 degrees angular resolution; 10%-0% maximum luminous intensity choose no more than 5 degrees angular resolution;
8.2 For lamps with beam angle ≥20°: 100%-50% maximum luminous intensity choose no more than 2 degrees angular resolution; 50%-0% maximum luminous intensity choose no more than 5 degrees angular resolution。
LISUN LSG-5000CCD Moving Detector Goniospectroradiometer fully meet the requierment, click here to learn more about it.
LSG-5000CCD Moving Detector Goniospectroradiometer
9. Stabilization Requirement (6.4 on Page 7 of standard)
9.1 Monitor for at least 30 minutes
9.2 Take at least three readings of the light output and electrical power consumption taken over period of 20 minutes
9.3 Stability shall be achieved when the variation (maximum to minimum) divided by the last measurements is less than 0.5%
10. Test Report（11.1 on Page 12 of the standard）
10.1 Test date and testing organization
10.2 Manufacture’s name
10.3 Optical parameters measured (e.g., total luminous flux, radiant flux, photon flux)
10.4 Measured electrical values (Clarify AC, including frequency, or DC)
10.5 Calculated quantities (e.g., luminous efficacy, angular color uniformity)
10.6 Ambient temperature
10.7 Measurement conditions. For sphere measurement: Sphere diameter, coating reflectance, 4π or 2π geometry. For goniophotometer measurement: Photometric distance
10.8 SI (source of traceability)
10.9 Self-absorption correction factor
10.10 Luminous intensity
10.11 Chromaticity coordinates, CCT, CRI
10.12 ANSI/IES TM-30-18 (Rg Rf,Local Chroma Shift, Local Hue Shift)
10.13 Spectral power distribution
Below is the test report of LPCE-2 High Precision Spectroradiometer Integrating Sphere System and LSG-5000CCD Moving Detector Goniospectroradiometer test system:
Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.
Our main products are Goniophotometer, Spectroradiometer, Integrating Sphere, LED Test Instruments, CFL Test Instruments, Photometer and Colorimeter, EMC & EMI Testing, Surge Generator, Electrical Safety Testing, Environmental Test Chamber, IP Waterproof Test Equipment, Dustproof Test Chamber, High and Low temperature Humidity Chamber, Plug and Switch Testing, AC and DC Power Supply.
Please feel free to contact us if you need any support.
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