Tunable White LED Classroom Lighting Improves Student Performance – FVTLED

Tunable White LED Classroom Lighting Improves Student Performance

May 19 2019

What if simple light changes can improve student performance in school? There is plenty of evidence that this can be achieved using adjustable white light. Traditionally, classrooms have been illuminated with fluorescent lights, giving off a single color of light. This color can range from warm white to cold white, but once you choose a light fixture, you can't change the color throughout the day. Research shows that not being able to change the color of light to suit the natural light cycle can have many negative effects on mental and physical behavior of the body.

On the other hand, adjustable white lighting can be used to simulate the circulation of natural light, which is good for the body and mind. This type of LED can emit a variety of white light and can be controlled by remote control or wall switch. In addition to energy efficiency benefits, adjustable white LED classroom lighting is associated with improved alertness, attention, higher test scores and reduced hyperactivity.

Adjustable white led classroom lighting panel
Adjustable white LED panel light, color range from 3000K to 5000K
Adjustable white led classroom lighting - fluorescent with led lights
Fluorescent panel lamps displayed next to adjustable white LED panel lights (left) (right)
A standard luminaire can emit one of several white shades, known as the associated color temperature (CCT) of the luminaire. CCT was measured by Kelvins (K). Different temperatures on the kelvin scale represent different colors. LED lights attract bugs and adjustable white LED classroom lighting - color temperature kelvin scale

Throughout the day and night, light follows a color cycle similar to the one shown above (orange-yellow-white-blue-white-yellow-orange). Our bodies get used to this cycle. Artificial light that deviates from the natural light cycle can throw out our circadian rhythms. Circadian rhythms are your body's response to light and time (physical, behavioral, and psychological).

According to healthybuildingscience.com "... Different types of light trigger different physiological effects. Blue/white light, similar to bright midday light, inhibits melatonin and increases serotonin. This kind of lamp is good for exercise. Instead, the red/orange light triggers melatonin and prepares you for sleep. If everything is in balance, the body produces the right amount of dopamine, serotonin, cortisol and melatonin at the right time. "

Researchers have found that when circadian rhythms are turned off, everything from sleep disorders to irritability and disease can happen. In the United States department of energy's report, in Texas Carrollton Carrollton - Farmers Branch independent school district three classroom assessment test LED lighting system, someone mentioned that "in classroom application, day and night during the day, including the response factor can provide a can support inhibit melatonin lighting, and provide can minimize melatonin suppression of lighting at night (when the classroom may be other community groups use). "

Adjustable white led classroom lighting and circadian rhythm

In order for the body to perform well, it is important that our circadian rhythms are stable. According to Lighting for People, a website focused on human-centered Lighting, "the lack of bright and blue light in the morning delays the body clock and makes us go to bed too late." The study confirmed that during the 11-day school week, adolescents had a higher risk of developing dementia. The study was created to reveal the correlation between light colors in the classroom and circadian rhythms. Specifically, the study looked at whether the onset of melatonin changed if students were exposed to light at low CCT.

In the study, students wore orange glasses to filter out all blue light. According to the report, "there was a significant delay of about 30 minutes in the occurrence of DLMO (dark light melatonin attack) after wearing orange glasses, indicating that the lack of short wave light may lead to circadian rhythm changes... A delayed body clock (night) can lead to poor exams and poor grades. "

In the study, published in optical letters, titled "dynamic lighting systems for learning environments: pupil performance," professors Kyungah Choi and hyun-jeong sook wrote, "... The use of high CCT white light illumination can improve the subjective alertness of students attending lectures. "They went on to say," in one of the first studies of dynamic lighting, Wessolowski documented significant improvements in German student performance by improving reading speed, reducing errors, and reducing hyperactive behavior. To support this argument, Sleegers et al. The positive effect of dynamic lighting on the concentration of Dutch primary school students was observed. "

Choi and Suk conducted several experiments. First, they found that different CCTS produce physiological arousal and relaxation. Participants were exposed to 6500K cold white light and 3500K warm white light, and their physiological responses were captured using an electrocardiogram (ECG). An electrocardiogram shows a cold white light waking up and a warm white light relaxing. On each school day, there is time for focus and concentration, and time for rest/social interaction.

In another experiment, they found that students performed better on math tests under 6,500k of cold white light. The study involved two fourth-grade classes at the same school. One classroom is equipped with fluorescent lamps and the other with adjustable white LED lamps. Students in both classrooms were given mathematical predictions and post-tests. The second test in the classroom used cold white light with adjustable Settings. The students with adjustable white LED classroom lighting improved their scores on the second test while those with fluorescent lights did not change significantly. Overall, the highest percentage of correct answers was found in cold white lighting. The study also showed that warm white light is best for resting activities.

Other studies have looked at the effects of daylight and full spectrum lighting in classrooms. Adjustable white LED classroom lighting can be used to simulate daylight cycles and has been shown to have similar effects to natural daylight exposure. A study in California's capistrano school district found that students who had the most daylight in the classroom completed math tests 20 percent faster and read tests 26 percent faster than students with less natural light. Another study involving the Poudre school district in Colorado showed that students in light-filled classrooms improved their test scores by 7%.

The benefits of adjustable white lighting have been demonstrated by post-research studies. If schools are to invest in this technology, they will create an environment that is truly suited to the school's efforts - beneficial, caring and conducive to student success. These new classrooms will be part of creating healthy individuals - not just mentally, but by giving them the bodies they need.

In classroom applications, circadian response considerations may include providing lighting that supports melatonin suppression during the day and providing lighting that minimizes melatonin suppression during the night (when other community groups have access to the classroom).

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