In the recent years, a lot of research have been conducted to determine the right amount of lighting to increase productivity at work, or even to improve our sleep. Then the big question gets asked: if it can affects worker productivity, would it not also affect student performances?
There are several studies regarding this subject, and beneath are a few notable ones:
We'll further discuss some notable points brought out in the studies, and how to create a productivity-inducing lighting system for students. Before we begin, this video from Phillips regarding the subject might entice you.
However, as mentioned in the above study by Dr. Ellen Mannell Grangaard, fluorescent lighting can be disruptive for student's concentration and performance.
The disruption is caused by the illumination process of the fluorescent itself, where the low-pressure gasses are constantly moving to collide with the fluorescent, or phosphorescent materials.
The movement of the gasses, commonly low-pressure mercury vapor combined with other gasses, is seemingly unseen by our naked eye. However, it can be distractive in a subconscious manner, causing loss of concentration and even subconscious tiredness.
The newer LEDs, which are common nowadays, are working in a different manner,producing a steady and consistent color spectrum at all times.
On the contrary, LED ability to cover a wide range of spectrum can increase alertness of students, as we will discuss in our next section.
Our photoreceptors, the neurons in our retina that process lights, respond strongly to blue light, which is found on higher color temperatures.
The most optimal color temperature that will help concentration and alertness, Osram claimed, is 8000 Kelvin or higher. Fluorescent lamps are typically operating in 4,500 Kelvin range, with the highest being slightly below 6,000 Kelvin, clearly way below this optimal number.
Osram also mentioned that although warm-white color temperature halogens (3,200 Kelvin range) can achieve the same effect, it will need a significantly higher light intensity, which translates to higher energy requirement.
In terms of efficiency, clearly, LEDs are the best choice to achieve the intended color temperature.
In their study, Osram used multiple 4,000 Kelvin LEDs as a direct lighting above the classroom, which in conjunction with their specially designed indirect LED lighting, achieved close to 14,000 Kelvin in total.
The Korea Advanced Institute of Science and Technology's research utilized different color temperatures at three classrooms, 3,500 K , 5,000 K, and 6,500 K. The results? Students in the 6,500 K class achieved better test results.
The South Korean research suggested that warm lighting (their 3,500K classroom) is best utilized to encourage recess, while the 5,000 K lighting is better for not too intense activities such as reading. 6,500 K, as mentioned, is best utilized for high-performance academic activities.
To achieve the dynamics required, a smart control system can be utilized to eliminate the needs to install multiple lightings.
Nowadays, smart LEDs that can be controlled by smartphones are also available to achieve this purpose, as we have covered in our previous article.
LED showed great advantages over other lighting sources to achieve the optimal color temperature without sacrificing energy efficiency. May the brightness of the LED bring the bright future of the next generation.
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