Results 31 to 40 of about 2,714,438 (302)

A Single-Stage High Power Factor Power Supply for Providing an LED Street-Light Lamp Featuring Soft-Switching and Bluetooth Wireless Dimming Capability

open access: yesEnergies, 2021
Light-emitting diode (LED) has the characteristics of environmental protection and energy saving, having become the lighting source of a new generation of street-light lamps.
Chun-An Cheng   +6 more
doaj   +1 more source

LED UNDERWATER LAMP AS FISH AGGREGATING DEVICE ON BOAT LIFTNET

open access: yesJurnal Teknologi Perikanan dan Kelautan, 2014
Study on LED underwater lamp as fish aggregating device was conducted todesign and construct the LED underwater lights, to analyze strength of materials used, to analyze the light illumination value and distribution generated from the lamp, and to ...
Eko Sulkhani   +3 more
doaj   +1 more source

Feasibility of Magneto-Encephalography Scan under Color-Tailored Illumination

open access: yesApplied Sciences, 2023
Color plays an important part in human activities, and it also affects circadian cycle and the decision making process. Therefore, it is important to investigate human judgment under different color of illumination, especially because color perception is
Charitha Weerasuriya   +6 more
doaj   +1 more source

Studying changes in the lighting characteristics of retrofit LED lamps during long-term testing

open access: yesVestnik MGTU, 2022
The paper analyzes the results of comparative studies of the lighting characteristics of retrofit LED lamps of the A60 form factor from various manufacturers: Uniel (Russia – China), JazzWay (Russia – China), Philips (Netherlands), Ecola (Russia), Wolta (
Nesterkina N. P.   +2 more
doaj   +1 more source

Compact UV LED Lamp with Low Heat Emissions for Biological Research Applications

open access: yesElectronics, 2019
Much biomedical research focuses on the effects of UV light on human cells. UV light sources are a prerequisite for such research. This paper presents the design and achieved performance of a UVA (Ultraviolet A: 320–400 nm) and a UVB (Ultraviolet B: 290 ...
M. Pirc, S. Caserman, P. Ferk, M. Topič
semanticscholar   +1 more source

Optimization of Helium Inflating on Heat Dissipation and Luminescence Properties of the A60 LED Filament Lamps

open access: yesInternational Journal of Photoenergy, 2019
LED filament lamp has the characteristics of nearly 360° lighting angle, high brightness, and low energy consumption, turning it gradually into the best substitute for traditional incandescent lamps. At present, due to the limitations of heat dissipation,
Yizhan Chen   +5 more
doaj   +1 more source

Enhancing Luminous Efficacy of White Led Lamp Using Ca2MgSi2O7:Eu2+ Phosphor

open access: yesJournal of Advanced Engineering and Computation, 2018
Along with the rapid development of science and technology in today's society, lighting technology, especially white light-emitting diodes (WLEDs), has become a critical and essential element in almost every field of our daily life.
Doan Quoc Anh Nguyen   +2 more
doaj   +1 more source

Light characteristics of high-power LED luminaire with a cooling system based on heat pipe

open access: yesSemiconductor Physics, Quantum Electronics & Optoelectronics, 2019
Discussed in the article is the possibility to create a wall-mounted LED luminaire with a built-in cooling system for a volumetric LED module put in the enclosed volume of the diffuser.
Yu.E. Nikolaenko
doaj   +1 more source

Design & Testing of LED based Solar Study Lamp for Underprivileged Community: A Laboratory based Approach [PDF]

open access: yesJournal of Electrical and Electronics Engineering, 2023
Globally billions of people lack access to electricity and students of those underprivileged locations are suffering from the lack of proper lighting source for their basic study in night-time.
CHAKRABORTY Suprava
doaj  

Complex temperature distribution model for controlling the thermal performance of household led lamps

open access: yesОмский научный вестник
The study covers the question of the dynamics of heat transfer in a household LED lamp and scenarios for simplifying the modeling of thermal distribution, including the account of heat conduction, convection and the influence of several LED light sources.
V. P. Kuzmenko
doaj   +1 more source

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