Lighting Control
Lighting Control - Related Videos
09:08
Rapid Optimization of a Light-Inducible System to Control Mammalian Gene Expression
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Cited by 1 •
2025
This study describes a method for high-throughput experiments using a 3D-printed LED array to optimize light-inducible gene expression in HEK293T cells.
08:17
Free-form Light Actuators — Fabrication and Control of Actuation in Microscopic Scale
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2016
Here, we fabricate 3D polymeric micro/nano structures in which both the shape and the molecular alignment can be engineered with nanometer scale accuracy by the use of direct laser writing. Light induced deformation of several types of liquid crystalline elastomer microstructures can be controlled in the microscopic scale.
08:37
Light-Controlled Fermentations for Microbial Chemical and Protein Production
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Cited by 4 •
2022
Optogenetic control of microbial metabolism offers flexible dynamic control over fermentation processes. The protocol here shows how to set up blue light-regulated fermentations for chemical and protein production at different volumetric scales.
08:35
Introduction to Light Microscopy
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2023
The light microscope is an instrument used by researchers in many different fields to magnify specimens to as much as a thousand times their original size. In its simplest form, it is composed of a clear lens that magnifies the sample and a light source to illuminate it. However, most light microscopes are much more complex and house numerous fine-tuned lenses with tightly controlled dimensions all within the body of the microscope itself and in components such as the objectives and eyepieces.
01:35
Light as Energy
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2019
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 less...
FAQs
Intensity, spectrum, direction, and timing can produce different biological signals, so treating them as separate experimental variables helps isolate cause and effect. This separation is especially useful when comparing light quality with exposure duration. By changing one property while keeping the others defined, researchers can determine which aspect of illumination is associated with a measured response.
Photoreceptors and other light-sensitive molecules detect features of illumination, including its intensity and spectrum, and convert those environmental differences into biological responses. Depending on the system, these responses may involve photosynthesis, circadian rhythms, development, or behavior. Controlling the detected light features therefore helps connect a specific illumination condition with the response observed in an organism.
Timing determines when an organism or biological preparation receives light, not simply how much light it receives. Defined schedules allow researchers to examine responses associated with exposure duration and recurring illumination patterns, while reducing uncontrolled variation between experiments. This is important for studies of circadian rhythms, plant growth, development, and behavior, where the temporal pattern of light is biologically relevant.
A reproducible setup specifies the intended light intensity, spectrum, direction, and timing, then applies those settings through a programmable system or a defined schedule. Researchers can also use feedback signals when illumination needs adjustment during the experiment. Maintaining these conditions across samples creates a consistent exposure and makes comparisons more interpretable by limiting environmental variability.
It supports plant growth experiments, animal behavior studies, microscopy, cell and tissue culture, and ecological simulations. The appropriate use depends on which biological response is being examined: growth, behavior, imaging, culture conditions, or environmental response. Across these settings, controlled illumination reduces variation in the surrounding conditions, allowing researchers to compare outcomes under deliberately defined light environments.
By reducing environmental variability, controlled illumination makes it easier to attribute differences between samples to the light conditions being tested rather than to accidental changes in exposure. Researchers can then compare biological outcomes under defined conditions and examine how organisms sense and respond to their surroundings. This supports more consistent interpretation across plant, animal, cellular, and ecological studies.