UPRtek Handheld Spectrometer – Technology and LED Optical Measurement Function FAQ.

Most commonly used measurement parameters and optical principles of the spectrometer are explained as follows in order to improve users application and know-how on international optical metrics. We hope you can find them useful and gain a knowledgeable information by referring to the answers below:

If you encounter any problems which is not listed below, please fill out the form and we will reply as soon as possible. Thank you for your cooperation.

What is CRI (Color Rendering Index)?

What is CRI (Color Rendering Index)? It is a metric used to measure the ability of a light to bring out colors in objects (i.e. Color Rendering). Lights with a high CRI rating can make store products look brilliant and vibrant. Other lights with low CRI ratings will make the same products drab and lifeless.Read More

What is CQS (Color Quality Scale)?

Yet another rendering index is the CQS or Color Quality Scale developed by the NIST (National Institute of Standards and Technology), an agency of the United States Department of Commerce.  CQS is also aimed at remedying the deficiencies of the CRI (Ra) indexing system. Read More

What is IES TM-30-15?

TM-30-15 is a color rendering index system published by IES (Illuminating Engineering Society).  A color rendering index system indicates how well a light, when shining on objects, can reproduce the object’s color accurately (compared to a black body radiator – e.g., the sun).  TM-30-15 is next in a line of predecessor CRI systems (CIE CRI, GAI, CQS), each intended to improve on previous designs.  In this article, we explain TM-30-15, its advantages, and why it’s important. Read More

What is TLA (Temporal Light Artifacts) ?

What is TLA or Temporal Lighting Artifacts?  They are mostly visual abnormalities or anomalies caused by pulsating or flickering lights.  Most times it’s hardly noticeable but it can have annoying side effects and even cause catastrophic events. Read More

What is Flicker Metrics (Percent Flicker, Flicker Index, SVM) ?

This article compares three flicker metrics regarding percent flicker, flicker index and SVM. The comparison includes the definition comes from which organization, the definition of itself, calculation formula and the description of the range. If you want to know more about which products have related measurement functions, please click on the relative products tab. Read More

What is Cosine Correction?

Cosine Correction is a term often encountered when working with light meters, yet it can be somewhat misleading both in its meaning and its connection to light meters. In this article, we aim to shed light on this concept by addressing the following key aspects Read More

What is the recommended measuring distance using UPRtek handheld spectrometer?

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, light color or light intensity. Read More

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    About UPRtek

    United Power Research and Technology

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

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

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    Medical Setting using LED or Fluorescent Lights

    GPEC Greenhouse Horticulture & Plant Factory Exhibition/ Conference

    GPEC is a leading international exhibition focused on the latest advancements and technologies in greenhouse horticulture and plant factories. We are excited to announce that our business partner, ARIANETECH PTE LTD, will be participating in the GPEC 2024 in Japan. They will have a booth at the exhibition where they will showcase our Handheld Spectral PAR Meter, PG200N. We encourage all international visitors attending this exhibition to visit Booth H-07 and explore our innovative PG200N.