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LED light output is proportional to electric current through the device, so light intensity can be controlled in a versatile way.
The high-intensity LED light used with a shorter curing time may be considered an advantage due to the reduced chair time.
The improvement is attributed to reduced re-absorption of wavelength-converted light by the LED chip.
To further improve the LED bandwidth, the resistance can be reduced by optimizing device layout as well as reducing material bulk resistance.
However, such capacity loss is so small that it can be negligible when the allowed peak optical intensity is twice of the nominal optical intensity of LED devices.
A high-intensity light-emitting diode (‘super LED’) could render intensive phototherapy more effective than the above conventional methods.
Light-emitting diode (LED) lighting should be considered for lighting efficiency enhancement, however, waste heat from light-emitting diode (LED) lighting increases the internal cooling load during the summer season.
Therefore the development of signals using LED as light source, able to respect intensity specifications, is not simple.

Related Questions

What is the effect of reduced light intensity on plants?5 answersReduced light intensity has various effects on plants. It can lead to decreased lateral root branching in barley due to suppressed auxin transport and reduced expression of auxin transporter genes. In Arabidopsis, low light prolongs the juvenile vegetative phase by increasing miR156 and miR157 expression, affecting SPL gene targets and carbohydrate production. Hyptis suaveolens plants exposed to low light intensity showed lower root growth and altered volatile compound production, potentially enhancing antimicrobial activity. In agroforestry systems, reduced light intensity negatively impacts wheat yield by decreasing fertile florets, photosynthetic rates, and grain yield, while increasing grain quality parameters like nitrogen concentration and protein content. Overall, reduced light intensity influences various aspects of plant growth, development, and metabolism.
How to prevent or reduce light pollution?5 answersTo prevent or reduce light pollution, several strategies can be implemented. One approach is to use energy-saving measures and efficient lighting solutions, such as light-emitting diodes (LEDs). Shielding luminaires and turning off artificial lights when not needed are also effective ways to reduce obtrusive light and unintended trespass. Another strategy is to use "amber" LEDs instead of phosphor-converted white LEDs with high correlated color temperatures, as they can help reduce sky glow and light pollution. Quantitative modeling and optimization methods can be used to identify key factors contributing to light pollution and develop strategies to mitigate it without hindering development. Additionally, the use of luminaire assemblies with light-absorbing surfaces can help reduce upward light pollution. Outdoor lighting modules with adjustable light blocking plates can also be used to prevent light pollution and control the radiation area of the light.
How to improve led efficiency?5 answersTo improve LED efficiency, several methods can be employed. One approach is to use a strong bombardment etching step and a weak etching step during the manufacturing process, along with applying a heat insulation transparent material on the surface of the LED chip. Another method involves using a nano-scratching technology to form patterning on the epitaxial structure of the LED chip, thereby enhancing light extracting efficiency. Additionally, adjusting the driving current of the LED lamp beads through a PWM control module can improve white light efficiency. Furthermore, a preparation method for an LED with high light efficiency involves reducing the loss of the light-emitting area, improving the growth quality of quantum wells, and increasing the contact area between electrons and holes. These techniques aim to enhance the overall performance and light-emitting efficiency of LEDs.
Does low lighting intensity have a negative impact on cognitive performance?3 answersLow lighting intensity does not consistently have a negative impact on cognitive performance. In one study, objective performance outcomes were not affected by low illuminance levels. Another study found that sleep structure, sleep quality, cognitive performance, and visual comfort did not significantly change under low illuminance conditions. However, it is important to consider individual differences in sensitivity to light effects and variations in basal level of arousal. Participants with higher levels of basal vigilance before light exposure benefited most from blue-enriched lighting, responding faster in cognitive tasks. Therefore, the impact of low lighting intensity on cognitive performance may vary depending on individual factors.
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