Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Light Acquisition02:16

Light Acquisition

8.8K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
8.8K
Estimation of the Physical Quantities01:05

Estimation of the Physical Quantities

6.7K
On many occasions, physicists, other scientists, and engineers need to make estimates of a particular quantity. These are sometimes referred to as guesstimates, order-of-magnitude approximations, back-of-the-envelope calculations, or Fermi calculations. The physicist Enrico Fermi was famous for his ability to estimate various kinds of data with surprising precision. Estimating does not mean guessing a number or a formula at random. Instead, estimation means using prior experience and sound...
6.7K
Light as Energy01:35

Light as Energy

85.1K
The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit...
85.1K
Calorimetry01:19

Calorimetry

3.4K
When objects at different temperatures are placed in contact with each other but isolated from everything else, they attain thermal equilibrium. A container that prevents heat transfer in or out is called a calorimeter, and the use of a calorimeter to make measurements is called calorimetry. Generally, these measurements involve heat or specific heat capacity. The term "calorimetry problem" is used for any problem where the specified objects are thermally isolated from their...
3.4K
Calculation of Electric Flux01:25

Calculation of Electric Flux

2.5K
Consider the electric field of an oppositely charged, parallel-plate system and an imaginary box between those plates. Let the bottom face of the box be ABCD, and the top face be FGHK. The electric field between the plates is uniform and points from the positive plate toward the negative plate. The calculation of this field's flux through the box's various faces shows that the net flux through the box is zero. Why does the flux cancel out here?
2.5K
Photoreceptors and Plant Responses to Light02:00

Photoreceptors and Plant Responses to Light

26.9K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
26.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Presleep Whey but Not Casein Protein Ingestion Improves Sleep Quality After Resistance Exercise When Compared With an Isocaloric Control in Resistance Trained Individuals.

International journal of sport nutrition and exercise metabolism·2026
Same author

Consensus on the definition of locoregional recurrence of colon cancer: protocol for an international Delphi study.

BMJ open·2026
Same author

Long-term outcome of patients with rectal cancer following transanal endoscopic microsurgery: Real-world insights from a single-center audit.

Current problems in surgery·2026
Same author

Time to listen: harnessing podcasts for stakeholder engagement in circadian and sleep science.

Npj biological timing and sleep·2026
Same author

Using agile development methodology to develop a decision aid for complex rectal cancer.

European journal of surgical oncology : the journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology·2026
Same author

Sneezing in response to naturalistic bright light exposure.

F1000Research·2026

Related Experiment Video

Updated: Nov 4, 2025

Measuring Light-Switching Behavior Using an Occupancy and Light Data Logger
05:50

Measuring Light-Switching Behavior Using an Occupancy and Light Data Logger

Published on: January 16, 2020

6.0K

luox: validated reference open-access and open-source web platform for calculating and sharing physiologically

Manuel Spitschan1,2,3,4,5,6,7, James Mead8, Chris Roos8

  • 1Department of Experimental Psychology, University of Oxford, Oxford, UK.

Wellcome Open Research
|November 16, 2022
PubMed
Summary

A new open-source platform, luox, helps researchers calculate light

Keywords:
CIEEDIEDLInternational Commission on Illuminationalpha-opic irradiancealpha-opic radiancechronobiologyconesenvironmental psychologyequivalent daylight illuminanceequivalent daylight luminanceipRGCslightmelanopsinnon-visual effects of lightopen accessopen sourcerodssleep researchspectrumweb platform

More Related Videos

Operation of Laboratory Photobioreactors with Online Growth Measurements and Customizable Light Regimes
05:21

Operation of Laboratory Photobioreactors with Online Growth Measurements and Customizable Light Regimes

Published on: October 28, 2021

2.4K
An Intra-Tissue Radiometry Microprobe for Measuring Radiance In Situ in Living Tissue
09:10

An Intra-Tissue Radiometry Microprobe for Measuring Radiance In Situ in Living Tissue

Published on: June 2, 2023

799

Related Experiment Videos

Last Updated: Nov 4, 2025

Measuring Light-Switching Behavior Using an Occupancy and Light Data Logger
05:50

Measuring Light-Switching Behavior Using an Occupancy and Light Data Logger

Published on: January 16, 2020

6.0K
Operation of Laboratory Photobioreactors with Online Growth Measurements and Customizable Light Regimes
05:21

Operation of Laboratory Photobioreactors with Online Growth Measurements and Customizable Light Regimes

Published on: October 28, 2021

2.4K
An Intra-Tissue Radiometry Microprobe for Measuring Radiance In Situ in Living Tissue
09:10

An Intra-Tissue Radiometry Microprobe for Measuring Radiance In Situ in Living Tissue

Published on: June 2, 2023

799

Area of Science:

  • Vision science
  • Chronobiology
  • Lighting research

Background:

  • Light profoundly impacts human physiology and behavior, influencing circadian rhythms and melatonin production.
  • Non-visual responses to light are crucial for understanding circadian photoentrainment and designing human-centric lighting.
  • The International Commission on Illumination (CIE) standardized spectral sensitivities for non-visual light effects in 2018.

Purpose of the Study:

  • Introduce luox, a novel, user-friendly, open-access, and open-source platform.
  • Enable researchers to calculate light-related quantities from spectral measurements.
  • Facilitate research in vision science, lighting, chronobiology, and sleep research.

Main Methods:

  • Developed a modular and extendable codebase for calculating spectrum-derived quantities.
  • Implemented calculations for CIE quantities and indices.
  • Ensured platform usability for researchers in adjacent fields.

Main Results:

  • The luox platform provides a lean and user-friendly interface for light data analysis.
  • Calculations of CIE quantities and indices have been validated and endorsed by the CIE.
  • The open-source nature allows for modularity and future extensions.

Conclusions:

  • Luox empowers researchers by simplifying the conversion of spectral measurements into reportable quantities.
  • The platform supports physiologically inspired architectural lighting design and advances non-visual light research.
  • The validated and endorsed calculations ensure reliable data for scientific applications.