LM-79 testing
What are the limitations of LM-79?
What are the limitations of LM-79?
As we all know about the strength of LM 79. Everything has its pros and cons. Let us have a look on the drawbacks of LM 79.
- LM 79 depicts the parameters of the individual products. So the obtained Parameters cannot be used to access alike products.
- Other limitation is the sample size. It does not state any sample size. So, the manufacturer provides only one sample instead of supplying more. This thus increases the vulnerability of lesser quality products.
- This can be used only to determine complete luminary instead of LED used ( as based on absolute photometry) , which can produce different results due to quality of accessories used like glass, thermal effect, lenses etc.
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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: [email protected]
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Lm-79 Testing | Lm 79 test report | Lm 79 test procedure India
LM-79 Testing, Lm 79 Test report, LM 79 Test procedure, India
ITC India is a NABL accredited laboratory in discipline of Electrical (T-1811), Electronics (T-3509) and photometry (T-3510), serving its satisfied customers for last 5 years. Laboratory is fully equipped with the highly accurate Machines to test LM 79. It owns a Integrating sphere as well as the Goniophotometer. Qualified and experienced engineer are appointed to perform the desired tests.
Gone are those days when we use incandescence (tungsten filament) or fluorescent (mercury atoms) bulb. They are replaced by LED’s Now; this is an era of SSL (LED) as ……There is innumerable reason for the rise in LED’s which cannot be counted on finger tips. It is beneficial to both USERS as well as to the nation. Its superior features make it so promising that one cannot deny using LED’s. The features of LED’s are, its low power consumption, digitally controllable, Low maintenance, Ultra long source life, no UV or IR radiations, No mercury content. SSL uses semiconductors material to convert Electricity into light. LED’s are non carbon materials.
Efficacy is the quality parameter for LED: it is measure in Lumen per watt. Higher efficacy means high energy efficient. Another quality factor is lifetime and last but not the least is Color rendering Index (CRI). CRI measures the ability of light source to reproduce the color of various objects in comparison with natural light source.
How LM-79 testing can help assess LED luminaries quality and performance?
AS LM79 report provides you with the Photometric as well as electrical parameters with a spectrum Test report. The photometric parameters are luminous flux, Efficacy and Radiant Power, CIE colorimetric Parameters (coordinates Color rendering Index (CRI), color coordinate Temperature (CCT) Duv Value, and light Intensity Distribution .Current, Voltage, Power factor, Power and frequency are the electrical parameters. It Focus on the efficiency and CRI, which are the quality parameter. Efficiency measures how much electrical energy is converting into light energy. Power factor is another electrical metric for LED driver performance and often a key parameter for street lighting due to the large number of these luminaries connected to the power grid. As far as for lifetime, LM 80 covers that part.
What is the LM-79 test methodology?
LM 79 is approved method to test Photometric and electrical measurements of Solid state lightning. It describes the procedure and precaution to be observed during measurements. This approved method covers LED based SSL products with control electronics and heat sinks incorporated, that is , those devices that require only AC main power or a DC voltage power supply to operate. This document does not covers SSL products that require external operating circuits, or external heat sink. LM 79 covers SSL product in a form of luminaries (fixture incorporating light source) as well as integrated LED lamps.
Why do we need it?
We need it to access the quality and other parameters due to increasing competition in the market. It provides the efficiency and power factor.
How is LM-79 different from other test methods used for conventional lighting products?
This approved method is a guide developed for the measurements of SSL products. While many other standards for photometric measurements of light sources and luminaries are available, these standards are separated for measurements of lamps and luminaries. Since the current SSL products are in the form of luminaries or lamps, and LED light source in luminaries are not easily separated as replaceable lamps, these existing standard cannot be applied directly to SSL products. This necessitates the use of absolute photometry. This test method uses absolute photometry where as other standard uses relative photometry in short.
Now lets us clear about relative and absolute photometry.
S.NO | Absolute Photometry | Relative Photometry |
1 | Total lumen output of a luminary (bulb with fixture) | Total Lumen output of a bare lamp is measured. |
2 | Method used to measure LED performance. | Method used to measure Bare bulb and system performance. |
3 | Output is relative to an easy measured condition.
|
Output is measured in calibrated units under specific operating and environment conditions, ambient temperature, input voltage and orientation. |
4 | Specific lamp performance does not matter,
|
Lamps and system performance matters.
|
5 | Use for SSL products | For NON SSL products |
What are the LM-79 test outcomes?
The outcome of the LM 79 is the REPORT providing all the required parameters as per LM 79.
They are ……
- CIE colorimetric parameters
- Chromaticity coordinate (x)
- Chromaticity coordinate (y)
- Chromaticity coordinate (u’)
- Chromaticity coordinate (v)
- Chromaticity coordinate (v’)
- Correlated color temperature(Tc)
- Duv Value
- Color Rendering Index(Ra)
- Photometric Parameters
- Luminous Flux( Lumen)
- Luminous Efficacy( Lm/W)
- Radiant Power
- Electric Parameters
- Input Voltage(V)
- Current(A)
- Power(W)
- Power Factor
- Frequency(Hz)
- Test information
Ambient Temperature, Stabilization Time, Total Operating Time, Sphere Dia, Photometric method or instrument used Wavelength range in nm of spectroradiometer.
Along with this a SPECTRUM TEST REPORT is also issued.
What are the limitations of LM-79?
- Chips, Packages, or Modules requiring external heat sinks or operating circuits are not covered
- Does not state the sampling size.
Is there a future scope for improvement in the LM-79 test?
Yes of course, there is always a scope for improvement in all areas.
Range/criteria of acceptance of CCT, CRI & Lumens may be defining to establish a harmonization of parameters globally.
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ITC India has around 5000 clients from LED lighting division from All over India.
Get LM 79 Test Report, You can Please feel free to Ask for Quotation.
Mr. Puneet Sharma | Call: 08196980555 | E-mail: [email protected]
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LM 79 Testing lab in India | laboratory For LED Testing ITCIndia
LM 79 Testing at ITC India Pvt Ltd | LM 79 Testing laboratory in India
If you are looking for LM-79 Testing Laboratory in India, ITCIndia Can Do. ITC India NABL Accredited Electrical Safety testing Laboratory Providing LM-79 Testing.
ITC India have NABL accreditation Testing laboratory under ELECTRICAL , ELECTRONICS and PHOTOMETRY testing with certificate no. T-3509 , T-3570 & T-1811. ITC India Testing Laboratory is fully equipped with high accuracy Measuring Instruments and trained personal to provide testing and certification Services for Electrical and Electronic equipments. ITC India Laboratory is following the procedure as required by International Standard IEC 17025 and is already certified for ISO/IEC 17025. ITC India offering this LM 79 testing services in all over India like , Mumbai , Chennai ,Ahmedabad , New Delhi, Pune, Banglore, Kolkata
ITC India Pvt Ltd. has recently installed the Goniophotometers LED/SSL at its Mohali laboratory. This is in addition to integrated sphere in the field of photometry testing of lamps & luminaires. With this additional testing facility, ITC India is able to perform complete photometry testing on all kinds of lamps and luminaires including LED lamps, LED Street Light, LED Downlights, outdoor lighting, LED floodlight, LED Tube lights, LED spotlight , led light strips, led light bars, led light fixtures, and luminaires.
ITC India Laboratory is totally equipped with high accuracy testing instruments like spectrometer , integrating sphere , Goniophotometer , power meter , LED driver tester , safety tester , environmental chamber , and many more to provide a total testing solution for LED based product
IES LM-79-08 standard
Approved Method: Electrical and photometric Measurements of Solid-state Lighting Product
Photometric Results
Colorimetric Parameters:
- Chromaticity coordinates: (Chroma x / Chroma y / Chroma u(u’) / Chroma v / Chroma v’)
- Correlated Color Temperature (CCT)
- Duv Value
- Color Ratio
- Peak Wavelength (nm)
- Half Bandwidth (nm)
- Dominant Wavelength (nm)
- Color Purity
- Color Rendering Index (CRI – Ra)
Photometric Parameters:
- Total Luminous Flux (Lumens)
- Luminous Efficacy (Lumens/Watt)
- Radiant Power (Watts)
Electrical Results:
- Input Power (Watts)
- Input Voltage (Volts )
- Input Current (Amps)
- Power Factor
- Input Frequency (Hz)
Additional Parameters:
- Stabilization Time (Light and Power) = 60 minutes
- Test Geometry Configuration = 4π
- Spectroradiometer = (Lisun LMS-9000A Plus)
- Ambient Temperature = 25.0°C
ITC India Lab can do the testing of your LED product against the different standard like LM 79, IS 16106, IEC 60598-1, IEC 61347-2-13, IEC 62384, IEC62722-2-1, IEC 62031, IS 15885(part2/sec13), IS 16103, IS 16102, IEC 62612, and IEC 60969 etc
LM 79 Testing for Solid State lighting; It includes below parameters like total lumens , CCT , CRI , Lm/watt , Luminous intensity distribution & electrical parameter like voltage , current , power & power factor ….
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ITC India have around 5000 clients from LED lighting division from All over India. if you are interested to Get LM 79 Test Report.If you’re Buyers Demanding for LM-79 Testing – Contact Now!
Mr. Puneet Sharma | Call: 08196980555 | E-mail: [email protected]
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This entry was posted in LED Bulb Testing, LED Street Light Testing, LED Testing, LED Tube Light Safety Testing, LM 79 Tesing For Street Light As Per IEC 60598-2-3, LM 79 Testing, LM-79 Testing Ahmedabad, LM-79 Testing for LED DownLight, LM-79 Testing for LED Flood lights, LM-79 Testing for LED Solar Street Light, Lm-79 testing lab in India, LM-79 Testing on High bay LED lights, LM-79 testing on High Power LED Light Model, LM-79 Testing | LM-79 Test Approved Methods, Luminaries LED Product Testing and tagged Agra, Ahmedabad, Ahmednagar, Aizawl, Ajitgarh (Mohali), Ajmer, Akola, Alappuzha, Aligarh, Alirajpur, Allahabad, Almora, Alwar, Ambala, Ambedkar Nagar, Amravati, Amreli district, Amritsar, Anand, Anantapur, Anantnag, Angul, Anjaw, Anuppur, Araria, Ariyalur, Arwal, Ashok Nagar, Auraiya, Aurangabad, Azamgarh, Badgam, Bagalkot, Bageshwar, Bagpat, Bahraich, Baksa, Balaghat, Balangir, Balasore, Ballia, Balrampur, Banaskantha, Banda, Bandipora, Bangalore Rural, Bangalore Urban, Banka, Bankura, Banswara, Barabanki, Baramulla, Baran, Bardhaman, Bareilly, Bargarh (Baragarh), Barmer, Barnala, Barpeta, Barwani, Bastar, Basti, Bathinda, Beed, Begusarai, Belgaum, Bellary, Betul, Bhadrak, Bhagalpur, Bhandara, Bharatpur, Bharuch, Bhavnagar, Bhilwara, Bhind, Bhiwani, Bhojpur, Bhopal, Bidar, Bijapur, Bijnor, Bikaner, Bilaspur, Birbhum, Bishnupur, Bokaro, Bongaigaon, Boudh (Bauda), Budaun, Bulandshahr, Buldhana, Bundi, Burhanpur, Buxar, Cachar, Central Delhi, Chamarajnagar, Chamba, Chamoli, Champawat, Champhai, Chandauli, Chandel, Chandigarh, Chandrapur, Changlang, Chatra, Chennai, Chhatarpur, Chhatrapati Shahuji Maharaj Nagar, Chhindwara, Chikkaballapur, Chikkamagaluru, Chirang, Chitradurga, Chitrakoot, Chittoor, Chittorgarh, Churachandpur, Churu, Coimbatore, Cooch Behar, Cuddalore, Cuttack, Dadra and Nagar Haveli, Dahod, Dakshin Dinajpur, Dakshina Kannada, Daman, Damoh, Dantewada, Darbhanga, Darjeeling, Darrang, Datia, Dausa, Davanagere, Debagarh (Deogarh), Dehradun, Deoghar, Deoria, Dewas, Dhalai, Dhamtari, Dhanbad, Dhar, Dharmapuri, Dharwad, Dhemaji, Dhenkanal, Dholpur, Dhubri, Dhule, Dibang Valley, Dibrugarh, Dima Hasao, Dimapur, Dindigul, Dindori, Diu, Doda, Dumka, Dungapur, Durg, East Champaran, East Delhi, East Garo Hills, East Khasi Hills, East Siang, East Sikkim, East Singhbhum, Eluru, Ernakulam, Erode, Etah, Etawah, Faizabad, Faridabad, Faridkot, Farrukhabad, Fatehabad, Fatehgarh Sahib, Fatehpur, Fazilka, Firozabad, Firozpur, Gadag, Gadchiroli, Gajapati, Ganderbal, Gandhinagar, Ganganagar, Ganjam, Garhwa, Gautam Buddh Nagar, Gaya, Ghaziabad, Ghazipur, Giridih, Goalpara, Godda, Golaghat, Gonda, Gondia, Gopalganj, Gorakhpur, Gulbarga, Gumla, Guna, Guntur, Gurdaspur, Gurgaon, Gwalior, Hailakandi, Hamirpur, Hanumangarh, Harda, Hardoi, Haridwar, Haryana, Hassan, Haveri district, Hazaribag, Hingoli, Hissar, Hooghly, Hoshangabad, Hoshiarpur, Howrah, Hyderabad, Idukki, Imphal East, Imphal West, India, Indore, ITC India led testing labs in india, ITC India Providng LM-79 Testing in Adilabad, ITC India test house, ITCindia test house, Jabalpur, Jagatsinghpur, Jaintia Hills, Jaipur, Jaisalmer, Jajpur, Jalandhar, Jalaun, Jalgaon, Jalna, Jalore, Jalpaiguri, Jammu, Jamnagar, Jamtara, Jamui, Janjgir-Champa, Jashpur, Jaunpur district, Jehanabad, Jhabua, Jhajjar, Jhalawar, Jhansi, Jharsuguda, Jhunjhunu, Jind, Jodhpur, Jorhat, Junagadh, Jyotiba Phule Nagar, Kabirdham (formerly Kawardha), Kadapa, Kaimur, Kaithal, Kakinada, Kalahandi, Kamrup, Kamrup Metropolitan, Kanchipuram, Kandhamal, Kangra, Kanker, Kannauj, Kannur, Kanpur, Kanshi Ram Nagar, Kanyakumari, Kapurthala, Karaikal, Karauli, Karbi Anglong, Kargil, Karimganj, Karimnagar, Karnal, Karur, Kasaragod, Kathua, Katihar, Katni, Kaushambi, Kendrapara, Kendujhar (Keonjhar), Khagaria, Khammam, Khandwa (East Nimar), Khargone (West Nimar), Kheda, Khordha, Khowai, Khunti, Kinnaur, Kishanganj, Kishtwar, Kodagu, Koderma, Kohima, Kokrajhar, Kolar, Kolasib, Kolhapur, Kolkata, Kollam, Koppal, Koraput, Korba, Koriya, Kota, Kottayam, Kozhikode, Krishna, Kulgam, Kullu, Kupwara, Kurnool, Kurukshetra, Kurung Kumey, Kushinagar, Kutch, Lahaul and Spiti, Lakhimpur, Lakhimpur Kheri, Lakhisarai, Lalitpur, Lamps & Luminaires - 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LM-79 Testing Mumbai
LM-79 Testing service in Mumbai
If you are looking for LM-79 Testing service in Mumbai Maharashtra India. ITC India NABL approved Electrical safety laboratory Can do LM 79 , IP 65 , testing against IEC/EN/ISO standards on your LED products, led light for luminous flux , CCT , CRI , Efficacy , charomaticity diagram, voltage , current , power , power factor, etc..
For More information you can write or call us
Thanks & Regards,
Puneet Sharma
M: +91.8196980555
[email protected]
ITC India Pvt. Ltd.
Submit Your Testing Requirements,Please fill out the Enquiry below:
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