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Interpretation of the latest American Energy Star IES LM-79-19 standard
07 Jan, 2020 2926

Interpretation of the latest American Energy Star IES LM-79-19 standard

LM-79-19 English Version Free Download: Click Here LM-79-19 Spanish Version Free Download: Click Here LM-79-19 Chinese Version Free Download: Click Here 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 ne...

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Comparative Evaluation between ANSI / IES Standards LM-79-19 and LM-79-08
08 Dec, 2019 4344

Comparative Evaluation between ANSI / IES Standards LM-79-19 and LM-79-08

LM-79-19 English Version Free Download: Click Here LM-79-19 Spanish Version Free Download: Click Here LM-79-19 Chinese Version Free Download: Click Here This article tries to make a comparative evaluation between ANSI/IES LM-79-19 Standard that has replaced ANSI/IES LM-79-08 that deals with the methods approved by ANSI/IES regarding performance, requirements technicians of photometric and electri...

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How do you choose integrating sphere if you test small size but high power HID lamp?
28 May, 2019 3342

How do you choose integrating sphere if you test small size but high power HID lamp?

HID lamp is high intensity discharge lamp. High pressure sodium lamp, high pressure mercury lamp, xenon lamp, metal halide lamp are all belong to HID lamp. We generally use Integrating Sphere Spectroradiometer Test System to test the photometric, colorimetric and electrometric parameters. Generally we suggest the diameter size of Integrating Sphere according to the size of lamp under test. If yo...

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How to choose integrating sphere to measuring different lamps
20 Jun, 2017 1244

How to choose integrating sphere to measuring different lamps

The Spectroradiometer Integrating Sphere System, there are two important parts: one is measuring and analysis; another is assistant part which providing testing environmental. Here we will discuss the assistant part, we knew that the integrating sphere spherical aggregates, the inner wall of integrating sphere is coated with a highly reflective coating material to the effect of light refraction. H...

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The Status of Integrating Sphere in China Market
26 Jan, 2017 5626

The Status of Integrating Sphere in China Market

IES LM-79 “Electrical and Photometric Measurement of Solid-State Lighting Products” as the exclusive international standard for measuring the total luminous flux, electrical power, luminous intensity distribution and correlated color temperature (CCT), color rendering index (CRI) and other colorimetric parameters of solid-state lighting products (SSL), it highlights the total luminous flux of ...

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What is the Integrating Sphere?
18 Jan, 2017 1443

What is the Integrating Sphere?

Integrating sphere is a hollow sphere with high reflectance surface, it is widely applied in testing lumen, chromaticity coordinates, CCT, dominant wavelength and peak wavelength etc for light source or luminaries. Here we talking about integrating sphere theory. The inner coating reflectance of integrating sphere is an important index for integrating sphere. The coating is ideal diffuse reflectio...

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Maintenance Method of Integrating Sphere
07 Jan, 2017 1105

Maintenance Method of Integrating Sphere

Integrating Sphere is a hollow sphere which inner surface coated with white diffuse material. There are one or several apertures on the wall of the integrating sphere. The aperture is used as light well and receiving aperture for placing light-receiving device. The inner wall of integrating sphere should be good sphere. It usually requires that deviation from the ideal spherical should be less tha...

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How to choose integrating sphere
29 Sep, 2015 1180

How to choose integrating sphere

1. According to the reflectivity of the internal coating: How to choose integrating sphere Note: It can select the coating according to the test requirement, the default is the BaSO4 coating. 2. According to the test method: We don’t discuss both the integrating sphere and goniophotometer here, we only talk about integrating sphere optics. How to choose integrating sphere Specification: The abov...

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Lumen test difference between integrating sphere and goniophotometer
16 Jul, 2015 4802

Lumen test difference between integrating sphere and goniophotometer

As well as we know that for the LED luminaires lumen test, the CIE121: 1996 Clause 6.1, CIE127-2007 Clause 6.2 and IES-LM-79-08 Clause 9.0 are mentioned two luminous flux test method: the first is adoption integrating sphere+photometer or spectrometer(recommend by CIE121: 1966 Clause 6.1.1, CIE127-2007 Clause 6.2.and IES-LM-79-08 Clause 9.0), this kind of test method is relative measurement method...

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The Description of Integrating Sphere Coating
25 Mar, 2015 1108

The Description of Integrating Sphere Coating

The ideal integrating sphere paint should have below performances: 1. High-Lambert characteristics (good diffuse reflection characteristics) 2. High reflectance in a wide wavelength range 3. High stability 4. Easy construction 5. Easy to remove The history of integrating sphere coating: In 1934, Principle of Optics mentioned the description of principle of integrating sphere and the formulations o...

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New Integrating Sphere Design
17 Feb, 2014 1646

New Integrating Sphere Design

Due to the LED luminaries such as LED street luminaries developed, to do 4π geometry testing, it is hard to be hold in the traditional integrating sphere design. To solve this problem, Lisun design a new kind of sphere.   New Integrating Sphere Design 1. The hold base can bear max 20kg, it can expanding to test all lamps such as E27/E40, all tubes such as T5/T8/T12, and all kinds of lumina...

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Improve the accuracy of the LED flux testing in the Sphere
07 May, 2013 2202

Improve the accuracy of the LED flux testing in the Sphere

Abstract: According to the particularity of LED luminous flux measurement, unique optimization is adopted in the design of the integrating sphere for LED measurement combined with the diffuse materials of high reflectivity, which makes the system stability and accuracy have great improvement. The experimental results show that the system stability and consistency is much higher than other commo...

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