XYZ is used to measure Colors in a light, but even though you measure a light from distances and the XYZ values change, the ratio of the XYZ values stay the same, indicating it’s the same light.

If you are measuring at a very close distance and the light is a very high intensity light, you may get an “Over Exposure” error.  And you will need to move far enough away until the error dissappears.

When measuring for a color on a chromaticity diagram, you measure each photon’s wavelengths; that doesn’t change no matter how far or close you are from the light source.

UPRtek offers portable LED light measuring instruments including Spectrometers,   Spectroradiometers, and Light Calibration Solutions.

The MK350D Compact spectrometer is for users who just need a simple product with basic measurements essentials. And yet, the measurement needs to be precise and up to the scrutiny of global standards.

This is because light disperses.  It means the farther the light is from a surface, the more light disperses and the less concentrated it becomes.  This dispersal of light follows a predictable pattern, as shown in Figure 5.

The CV600 spectral color meter is for cinema and stage lighting professionals, providing tools to help assess/adjust color fidelity, improve color rendering, purchase better lights, recall lighting setup from previous performances and make better overall choices about lighting with the numbers.

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To understand why, you must look at light’s peculiar quality – Light is both particle and wave.  When you measure for LUX, you are measuring particles of light or photons – and these photons are dispersed from the light and become less concentrated as distance increases.

Our FAQ and repository of articles have a purpose of supplying a community of lighting specialists with a central location for a wide scope of lighting related topics.

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The uFlicker PC Software allows you to cable-connect your PC to a UPRtek device for PC controlled flicker operations. This allows you to have a workstation with operative controls, and full screen view with flicker data and graphs all in one place.

UPRtek is committed to providing you with support and services through clear, concise communications and well-set expectations.

UPRtek (est. 2010) is a manufacturer of portable, high-precision light measurement instruments; Handheld Spectrometers, PAR meters, Spectroradiometers, Light Calibration Solutions.

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If you look at the R1-R15 for CRI, they also may appear as intensities of colors.  But these values are not intensities – they are differences in color reflection off objects from a test light compared to a percentage of reflection from sunlight.

Our spectrometer users ask whether the distance between your meter and the light source should be considered when measuring your light. It depends on what you are measuring.  There are two situations you should consider.

UPRtek (est. 2010) is a manufacturer of portable, high-end spectral light measurement instruments – Spectrometers, Spectroradiometers, Light Calibration Solutions. UPRtek is headquartered in Taiwan with worldwide representation through our certified Global Resellers.

It states that the amount of light diminishes proportionately by distance, or more specifically, by the square of the distance.

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When considering a spectrum, there is an element of intensity – the left side of the chart refers to intensity – however,  there are no actual values on the left side of the chart.  This is because when you look at a spectrum, most times, you are eye-balling (visualizing) the shape of the spectrum and comparing the relative intensities of colors, not the absolute intensity values.  Thus, the distance from meter to light is still not essential – the shape of the spectrum will not change with distance.

With the uSpectrum PC Software, you can connect your UPRtek device by USB cable to a PC or laptop, for full screen views and keyboard operations.

UPRtek HQ, R&D and manufacturing are all based out of Taiwan, with Worldwide representation through our certified Global Resellers.

Our machine lights have high protection ratings to provide reliable and safe lighting for machinery and production facilities.

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Everything thing you need to know about Flicker, an insidious, potentially serious lighting artifact impacting visual safety for public places like hospitals, offices, libraries, and more...

The MK350N Premium is our popular mid-range spectrometer, made for professionals who want top spectrometer performance without the need for specialized niche features (e.g. Manufacturing , PAR meter, Lighting Design).

MK350S Premium is a full-featured Handheld Spectrometer used by lighting professionals with wide ranging projects and lighting challenges.

The other item to consider is that most measurement devices will always have some very small margin for error – you can find these in the specifications for your UPRtek device, downloadable from our website support center.

When you take CIE XYZ readings, the XYZ values change dramatically with distance.  You may be misled to think that distance is important, but it’s not.

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When you measure for LUX or PPFD (grow lights), you measure the amount or quantity of light hitting a surface area.  In these cases, the distance is essential.

Figure 10 – The left screen is from very near the light,  the right screen at a further distance.  Notice how the XYZ values change, but distance is still not important, because ratios are the same.

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The UV100 Spectral UV meter meaures ultraviolet light for modern-day applictions. Industrial curing, medical sterilization and UV bulb production using UV light require more versatile, visual and accurate spectral measurement devices to make sure UV light is used efficiently and optimally for light-critical instrumentation and products.

uSpectrum Accessory/App/Software allows connectivity from our products to PC/laptops/mobile devices, giving you all the advantages of your existing digital world.

It encompasses radiation with wavelengths ranging from 15 μm (micrometers) to 1 mm, which corresponds to a frequency range of approximately 20 THz to 300 GHz.

However, the farther the spectrometer is from your source light, the more opportunity ambient light from surrounding windows or even the light reflecting from nearby surfaces, such as walls or ceilings, can affect the precision of the measurement.

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The PG200N is a Spectral PAR meter used to measure the quantity and quality of light for a new generation of indoor farmers who use artificial lighting as a substitute or complement to sunlight.

If you measure for color or CCT, the distance between the spectrometer and the light source is not really important. Whether you measure at 1 or 3 meters should make little difference – your CCT should remain consistent.

If you are measuring light color for precision applications in scientific, research, or industrial testing, you should measure in a confined room with light-absorptive walls (i.e. blackbody surfaces).

We stated that the distance between your light meter and the light source is essential if you are measuring the amount of light but not important if you are measuring the color of light.

The MK550T Handheld Spectroradiometer is used by Display Panel manufacturers as a cost-effective, lab-level device that measures panel performance.

LED products are everywhere. They traverse the entire spectrum of manufacturing, academics, science, government and commerce. Here we explain the challenges and solutions to a wide range of LED applications, and how UPRtek products have become an important tool in our industry.

The MD100N is a spectroradiometer that is cost-effective, with fast measurement times, and a focus on Laboratory-level precision. It can be used by manufacturers, OEM/ODM companies of any size and allows much more flexibility and versatility in Quality Control.

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