PHOTOMETRY TESTING LABORATORIES

What is Relative Photometry?

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What is relative photometry?

Total Lumen output of a bare lamp is measured in relative photometry   for more clarity; the total luminous flux of the lamp is measured separately without the Fixture. In IES LM-80- 08, IES LM 82-12, the relative photometry is used. The purpose is to find light output, Efficacy, color over temperature for light engines.

Relative photometry can measures:

  • Total luminous flux of the bare lamp
  • Luminous intensity distribution
  • Scale the luminous intensity values by the ratio of the measured lamp lumens to the rated lamp lumens.

Some important features regarding relative photometry:

  1. Relative photometry is performed for luminaries with conventional sources.
  2. Luminaries test is referenced to the luminous Flux measured for bare lamp.
  3. The result produced is in the units of candela per rated lumens( cd/rated lm)
  4. It can also measure the efficiency of luminary.
  5. Normalize ballast factor, Lamp age.
  6. Specific lamp performance doesn’t matter

Relative photometry is not used in SSL with integrated lamps due to many reasons:

  • The LED‘s are difficult to remove from the Luminaries.
  • A large number of LED devices will not work properly without heat sinks provided with luminaries.
  • The thermal environment that the LED devices undergo within the luminary is often radically different from the thermal environment it will practice in its “bare lamp” configuration.

If you’re Buyers Demanding for LM-79 Testing– Contact Now!

Wish this blog post will be help. If you have any other questions, please feel free to contact us. ITCIndia team looking forward work with you and get better together!

Mr. Puneet Sharma | Call: 08196980555 | E-mail: ITCIndiaOne@Gmail.Com

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Photometric Testing Experts

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Searches related to Photometric Testing Experts, What is Photometric Testing, Photometric Test Procedure, Photometric Test Report, Photometric Testing India, LM-79 Testing Experts, Photometric Testing labs, LED Testing Experts, Photometric Testing for LED Lighting

If you are looking for Photometric Testing Laboratory for LED Lighting In your Area, ITCIndia Electrical Safety testing Laboratory Approved from NABL. ITC India one of the best Photometric Testing Laboratory in India, Mumbai, Chennai, Ahmedabad, New Delhi, Pune, Kolkata, Bangalore, Hyderabad, Surat, Visakhapatnam.

ITCIndia “Institute of Testing and Certification India Pvt. Ltd” are a leading testing lab having a NABL accreditation under ELECTRICAL, ELECTRONICS and PHOTOMETRY testing with certificate no. T-3509, T-3570 and T-1811. ITCIndia Lab is following the procedure as required by International Standard IEC 17025 and is already certified for ISO/IEC 17025.

As the development of LED technology continues to grow and diversify, the need for consistent and standardized testing procedures for LED has become more prevalent than ever. ITCIndia is NABL Accredited laboratory for Photometric Testing for LED Lighting, LM 79 Testing.

Institute of Testing and Certification India Pvt. Ltd has made strides to stay current with the new testing standard LM-79 set forth by the IESNA (Illuminating Engineering Society of North America). In addition, “ITCIndia” testing is now a priority when testing our LED light systems for more reliable results.

ITCIndia Lab has made strides to stay current with the new testing standard LM-79 set forth by the IEC/EN 60598. In addition, ITC INDIA testing is now a priority when testing our LED light systems for more reliable results. Fixtures tested by LM-79 standards will now feature a Lighting Facts label provided through the program created by the IEC/EN.

LM-79 Electrical and Photometric Measurements of Solid-State Lighting Products

Approved method describing procedures and precautions in performing reproducible measurements of LEDs:

  • Total luminous flux
  • Electrical powers
  • Luminous Intensity distribution
  • Efficacy (lm/watt)
  • Chromaticity

How To do Photometric Testing?

Check Our Photometric Testing Scope

Absolute Photometry Basis

  1. LM-79 requires complete luminaire testing
  2. Traditionally, photometric evaluation of lighting products is based on separate tests for lamps and luminaires
  3. For SSL products, LED lamps typically cannot be separated from their luminaire because of heat effects

Relative vs. Absolute Photometry

Relative testing – Lamps of interest and luminaire are measured separately. Then the actual light distribution and intensity of the complete luminaire of interest is derived by normalization of the test data

Absolute testing – The actual light distribution and intensity of the luminaire of interest is measured directly from the complete luminaire.

For your better understanding, we are going to show you the Photometric Test report of latest LED in the following:

Learn more about this Photometric test >

If you’re Buyers Demanding for Photometric Testing– Contact Now!

Wish this blog post will be help. If you have any other questions, please feel free to contact us. ITCIndia team looking forward work with you and get better together!

Mr. Puneet Sharma | Call: 08196980555 | E-mail: ITCIndiaOne@Gmail.Com

Get Instant Quotations, Fill the Enquiry form:

Photometry Training Course In India

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Photometry Training Course Brochure

PHOTOMETRY TRAINING COURSE

Photometric Testing helps you to understand the basic concepts of light, LED and solid state lighting specifications. Our regular 2-day training course in photometry, Colorimetry and light measurement will help you to understand LED and lighting specifications and avoid common misconceptions that come to one’s mind while operating/testing these devices. We will show you how to correctly measure and express the performance of your lighting products and the training will benefit technical and marketing staff alike.

Training Insights:

Lighting is an exciting and rapidly developing area -LEDs and solid-state lighting promise not only energy efficiency but also designs. Yes!! LED specifications are often mistrusted and sometimes misleading too.

Developed in partnership with measurement equipment specialists Eurotech Assessment and Certification Services Pvt. Ltd. training course in Photometry, Colorimetry AND Light measurement through Gonio-photometer and integrating sphere help you to understand LED and lighting specifications, to separate the reality from fiction in LED specifications and show you how to measure and express the output of various lighting products and ways to interpret its results.

Our Training presents what is often thought as highly complex technical subjects in an easily understood way and combines a review of the theory of light and color measurement with practical, hands-on experience with the latest photometry equipment. Our state-of-the-art training lab contains integrating sphere, LED Power driver tester, Test Panel, Vitric, HV Tester, ECR, Gonio-photometers, Spectro-radiometer and many more.

Practical exercises included in the Photometry Training involve measuring the luminous flux-color temperature and color rendering of an LED fitting, a demonstration of the inverse squared law, and measurement through integrating sphere for the creation of data file.

COURSE DETAILS:

Module 1: Basic Concepts

 Light, Materials and the Human Visual System Light and the electromagnetic spectrum, Vision, S:P ratio and BS EN 5489-1:2013,Reflectance – specular, diffuse and scatter, Lambert Cosine Law.

Module 2: Photometry

 Introduction, Angle, Solid Angle, Luminous Intensity, Luminous flux, Illuminance, Photometer, Energy efficiency metrics-LOR, luminous efficacy & energy efficiency index,  The inverse squared law, Photometric field – near-field versus far-field measurements, Photometric applications

Module 3: Colorimetry

 Introduction, Components of Colorimetry, Color vision   and
Tristimulus theory, CIE color model, CIE color spaces and chromaticity, Color temperature & correlated color temperature, CIE standard illuminants, Dominant wavelength & purity, Color difference sensitivity & metrics.

Module 4: Integrating Sphere Measurements

Introduction, choosing the correct size sphere, Calibrating the integrating sphere, Correcting for sample absorption, Uncertainty and sources of error, precautions.

Module 5: Goniophotometry & Standard Photometric Data

Introduction, Standard photometric data Files, photometric data types, Goniophotometry Types.

About photometric Testing:

Eurotech Assessment and Certification Services Pvt. Ltd. is an independent test lab specialising in the measurement of light, lighting products and the optical properties of materials. We provide precision measurements of the color and brightness of LEDs, luminaires, solid state lighting, lamps, signs, and displays.We help you to save time and money in bringing your next generation of products to market.

 

Eurotech Assessment and Certification Services Pvt. Ltd.has invested in the latest, state-of-the-art photometric, spectroradiometric and goniophotometric equipment to ensure that our measurements are accurate, repeatable, traceable and conform to the latest international standards. This investment has resulted in the creation of what is probably the most up-to-date, independent lighting test laboratory in India. With years of experience, we have absolute confidence in our results.

You you are Interested, Please fill out the Enquiry form below: