Light-emitting-diode lamps are widely used because of their long lifespan and excellent electric efficiency. Recently, LED light sources were introduced in several vitrectomy machines for endo-illumination of the retina1. Despite the several advantages of LEDs, many researchers have reported that ...
A), spectral irradiance of the sun on July 2nd, 2019 from 9:00 to 15:00, B), spectral irradiance of visible lamps C), spectral irradiance of cell phones and tablets. D), spectral irradiance of monitors and TV. Table 1. Real (unweighted) irradiance in the visible light range (400–...
e Visible light LED lamps used for THz detection. HWP: half-wave plate; LN: lithium niobate; OAP: 90° off-axis parabolic mirror; P1 and P2: THz polarizer; PCB: printed circuit board; QWP: quarter wave plate; GP: Glen-prism. Full size image THz field strength and polarization ...
So many benefits. Full Color Dynamic Effects Smart Bulb Full Color Direct Connect Smart Bulb Features Experience the smart benefits Control with your voice Pair your Smart Bulbs and Light Strips with a smart assistant—like Amazon Alexa or Google Assistant—for hands-free voice control of your li...
On the night of Diwali, the houses, temples, streets, shops and offices get illuminated with an array of oil lamps. All these lights eliminate darkness, and the prayers and celebrations create an atmosphere of love, happiness, purity and compassion. In many areas in India, Diwali is a ...
light pollution. Unfortunately, many nocturnal insects of conservation concern have historically been monitored via light traps alone. Going forward, insect conservationists should seek out alternative sources of monitoring data against which to calibrate estimates of demographic history obtained from light ...
Each lamp only cost ＄20.However,this was a lot of money to many villagers,so Evans made sure he kept the cost down.He used recycled materials and ask volunteers to build the lamps.Finally,people from many countries gave away money to his team,so the lamps were u...
(10 hens in each cage as a replicate). UVB-LED lamps installed under the feed troughs were used to provide UVB light (296–316 nm) for the birds in the three treatment groups (1 h, 2 h, and 3 h UVB supplementation per day, respectively), while the control group was not exposed ...
To help people living in villages, I made this solar light bulb for providing a low-cost solution by replacing their harmful kerosene lamps. This will empower the world’s poor to replace kerosene with clean solar-powered light. I got inspiration from NOKERO.I always prefer to make something...
Understanding these phenomena is increasingly important as the light from modern lamps, such as LEDs, typically contains a greater percentage of blue light, making them more biologically effective, and the use of devices that emit artificial light (e.g., smartphones) becomes more pervasive4,26,...