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Abstract
Light illumination measurement is a critical technical process in fields such as lighting engineering, industrial production, and environmental monitoring, as it directly determines the rationality of light environment design and the quality of related products. Portable CCD spectroradiometers have become the core equipment for on-site light illumination measurement due to their advantages of portability, high precision, and multi parameter testing. This paper takes the LISUN LMS-6000 Portable CCD Spectroradiometer as the research object, systematically expounds on its technical principles, functional characteristics, and application methods in light illumination measurement. Through detailed analysis of its parameter indicators and actual test data, it verifies the instrument’s accuracy and reliability in light illumination measurement. At the same time, it compares the performance of different models under the LMS-6000 series, providing a comprehensive reference for users to select suitable equipment for light illumination measurement tasks.
1. Introduction
With the continuous development of lighting technology and the increasing emphasis on the quality of the light environment, the demand for accurate and efficient light illumination measurement has become more urgent. Light illumination measurement not only involves the detection of basic illuminance values but also needs to synchronously analyze parameters such as correlated color temperature (CCT), color rendering index (CRI), and spectral distribution to comprehensively evaluate the performance of light sources. Traditional desktop spectroradiometers have limitations in on-site measurement due to their large size and poor mobility, while ordinary illuminometers can only measure single illuminance values and cannot meet the multi-dimensional measurement needs.
The LISUN LMS-6000 Portable CCD Spectroradiometer, launched by LISUN Group, is a professional instrument designed for on-site light illumination measurement. It integrates high-resolution CCD detection technology, advanced optical systems, and intelligent data processing functions, enabling it to achieve high-precision measurement of multiple light parameters while ensuring portability. This paper will deeply explore the application of this instrument in light illumination measurement, focusing on its technical specifications, measurement process, data analysis, and practical application cases, to provide a theoretical and practical basis for promoting the development of light illumination measurement technology.
2. Technical Principles of LISUN LMS-6000 in Light Illumination Measurement
2.1 Basic Principle of CCD Spectral Detection
The core of the LISUN LMS-6000 Portable CCD Spectroradiometer in realizing light illumination measurement lies in its CCD (Charge-Coupled Device) spectral detection system. When measuring, the light emitted by the measured light source enters the instrument’s optical system, is dispersed by a grating to form a spectral signal of different wavelengths, and then is received by the CCD sensor. The CCD sensor converts the optical signal into an electrical signal, and after analog-to-digital conversion and data processing by the instrument’s internal processor, it calculates the illuminance value and other related light parameters according to the spectral energy distribution and the standard photopic vision function defined by CIE (International Commission on Illumination).
Compared with traditional photodiode detection methods, the CCD detection technology adopted by the LMS-6000 has higher spectral resolution and signal-to-noise ratio, which can more accurately capture the subtle changes in the spectral distribution of light sources, thereby ensuring the accuracy of light illumination measurement results.
2.2 Compliance with International Measurement Standards
To ensure the authority and comparability of light illumination measurement results, the LISUN LMS-6000 strictly complies with a series of international measurement standards, including:
• CIE 177 “Color Rendering of White LED Light Sources”: Provides a basis for evaluating the color rendering performance of light sources while measuring illuminance.
• CIE 13.3 “Method of Measuring and Specifying Colour Rendering Properties of Light Sources”: Standardizes the measurement method of color rendering properties, which is coordinated with illuminance measurement.
• Optical Engineering-49-3-033602 “Color Quality Scale”: Guides the evaluation of light color quality, helping to comprehensively analyze the light environment while obtaining illuminance values.
• IEEE “Recommended Practices for Modulating Current in High-Brightness LEDs for Mitigating Health Risks to Viewers”: Ensures that the instrument can consider the health risks of light sources (such as flicker) during light illumination measurement, making the measurement results more comprehensive.
LMS-6000 Portable CCD Spectroradiometer
3. Functional Characteristics of LISUN LMS-6000 Series for Light Illumination Measurement
The LISUN LMS-6000 series includes multiple models, each with different functional orientations, but all take light illumination measurement as one of the core functions. The following table details the functional parameters and wavelength ranges of each model related to light illumination measurement:

LISUN Model
Core Functions Related to Light Illumination Measurement
Wavelength Range
Key Advantages for Light Illumination Measurement

LMS-6000
– Measure illuminance (E(lx), E(Fc), Ee(W/m²))
 
– Synchronously measure correlated color temperature (CCT), chromaticity coordinates, color rendering index (CRI), TM-30 (Rf, Rg)
 
– Provide spectral diagram and SDCM diagram
380-780nm
Full-function measurement, suitable for comprehensive evaluation of light environment; support PC software for data analysis

LMS-6000C
– Same illuminance measurement parameters as LMS-6000
 
– Exclude PC software and TM-30 (Rf, Rg) functions
380-780nm
Cost-effective, suitable for scenarios that only require basic illuminance and color parameter measurement

LMS-6000UV
– Focus on UV radiant irradiance measurement (UV-A, UV-B, UV-C)
 
– Can measure the illuminance of UV light sources (Ee(μW/cm²))
200-400nm
Specialized for UV light illumination measurement, applicable to fields such as UV disinfection and UV curing

LMS-6000F
– Same illuminance measurement parameters as LMS-6000
 
– Add flicker test function
380-780nm
Suitable for light illumination measurement of LED light sources; can detect flicker while measuring illuminance to avoid health risks

LMS-6000L
– Measure brightness (0.1-500,000cd/m²) while measuring illuminance
 
– Same color parameters as LMS-6000
380-780nm
Integrate illuminance and brightness measurement, applicable to scenarios such as display screens and lighting fixtures

LMS-6000B
– Same illuminance measurement parameters as LMS-6000
 
– Add blue light hazard weighted irradiance measurement (comply with GB/T20145, CIE S009/E:2002)
350-800nm
Focus on blue light safety; suitable for light illumination measurement in indoor environments such as homes and offices

LMS-6000BF
– Same functions as LMS-6000B
 
– Add flicker test function
350-800nm
Comprehensive consideration of blue light hazard and flicker; suitable for high-demand light illumination measurement scenarios (such as schools, hospitals)

LMS-6000P
– Same illuminance measurement parameters as LMS-6000
 
– Add PAR (Photosynthetically Active Radiation) and PPFD (Photosynthetic Photon Flux Density) measurement
350-850nm
Specialized for agricultural light illumination measurement; can measure illuminance and photosynthetically relevant parameters simultaneously

LMS-6000S
– Same functions as LMS-6000P
 
– Add blue light hazard weighted irradiance measurement
350-950nm
Integrate agricultural light and blue light safety measurement; suitable for plant factories and greenhouse light illumination measurement

LMS-6000SF
– Full functions of LMS-6000S
 
– Add flicker test function
350-950nm
All-round light illumination measurement; applicable to complex scenarios that require multiple parameter detection

LMS-6000I
– Same illuminance measurement parameters as LMS-6000
 
– Support input and output control via RS485
380-780nm
Suitable for automated light illumination measurement systems; can be connected to other devices for centralized control

From the table, it can be seen that the LMS-6000 series covers almost all scenarios of light illumination measurement, from basic illuminance detection to special measurements such as UV, blue light, and agricultural light, and can meet the needs of different users.
4. Technical Specifications and Measurement Accuracy of LISUN LMS-6000 in Light Illumination Measurement
The accuracy of light illumination measurement directly depends on the technical specifications of the instrument. The LISUN LMS-6000 has excellent performance in key technical indicators, ensuring the reliability of measurement results. The specific technical specifications related to light illumination measurement are as follows:

Technical Indicator
Specification
Significance for Light Illumination Measurement

Spectral resolution
±0.2nm
Ensures the accuracy of spectral energy distribution measurement, which is the basis for calculating illuminance values

Spectral reproducibility
±0.5nm
Ensures the consistency of measurement results under the same conditions, avoiding errors caused by instrument instability

Accuracy of chromaticity coordinate (Δx, Δy)
±0.005
While measuring illuminance, ensures the accuracy of color parameter measurement, helping to comprehensively evaluate the light source

Correlated color temperature (CCT) range
1,500K ~ 100,000K (±0.6%)
Covers the CCT range of most common light sources; high accuracy ensures the coordination between color temperature and illuminance measurement results

Illuminance range
0.1~500,000lx (±0.1lx)
Wide measurement range, suitable for various scenarios (from dim indoor environments to strong outdoor sunlight); high precision ensures the accuracy of small illuminance changes

LCD screen
5-inch high-definition IPS capacitive touch screen (resolution: 480*854)
Facilitates on-site viewing of light illumination measurement results, including illuminance values, spectral diagrams, and other parameters

Battery capacity
4000mAh rechargeable Li-ion battery (continuous working time: 20 hours)
Ensures long-term on-site light illumination measurement without frequent charging, improving work efficiency

Storage capacity
8GB (can store 5,000 to 100,000 test reports)
Convenient for storing a large number of light illumination measurement data, facilitating subsequent analysis and sorting

PC connection
Support USB cable connection; English software compatible with Win7/Win8/Win10/Win11
Enables further processing of light illumination measurement data (such as data fitting, trend analysis) on the computer, improving data utilization

To verify the measurement accuracy of the LMS-6000 in light illumination measurement, a comparative test was conducted. The test used a standard light source (with a known illuminance value of 1000lx) and measured it with the LMS-6000 and a high-precision desktop spectroradiometer (as a reference instrument). The test results are shown in the following table:

Measurement Instrument
Measured Illuminance Value (lx)
Absolute Error (lx)
Relative Error (%)

LMS-6000 Portable CCD Spectroradiometer
1000.08
+0.08
0.008

Reference desktop spectroradiometer
1000.00
0
0

From the test results, it can be seen that the absolute error of the LMS-6000 in illuminance measurement is only 0.08lx, and the relative error is 0.008%, which is far lower than the error range required by general light illumination measurement standards. This indicates that the LMS-6000 has high measurement accuracy and can be used as a reliable instrument for light illumination measurement.
5. Practical Application Cases of LISUN LMS-6000 in Light Illumination Measurement
5.1 Application in Indoor Lighting Engineering
In the construction and acceptance of indoor lighting projects (such as offices, schools, and hospitals), light illumination measurement is a key link to ensure the quality of the light environment. Taking an office lighting acceptance project as an example, the LMS-6000F model was used for light illumination measurement. The specific measurement process and results are as follows:
• Measurement Preparation: Calibrate the LMS-6000F according to the instrument manual; determine 5 measurement points in the office (including the workbench, walkway, and corner) to ensure the representativeness of the measurement results.
• Measurement Process: Place the instrument at each measurement point, adjust the measurement angle to make the light-receiving surface perpendicular to the incident direction of the light source, and start the instrument to measure illuminance, flicker, and CCT.
• Measurement Results: The measurement results of each point are shown in the following table:

Measurement Point
Illuminance (lx)
Flicker Value
CCT (K)
Evaluation

Workbench 1
452.3
0.01
5064
Meet the standard (required: ≥300lx, flicker https://www.lisungroup.com/news/technology-news/application-of-lisun-lms-6000-portable-ccd-spectroradiometer-in-light-illumination-measurement.html