How Do LED Flashlights Work? The first LED was invented by accident in 1961 by James R. Biard and Gary Pittman, while working on developing semiconductors. Shortly after that, IBM began to use them in punch-card readers. Although LEDs were used widely in numerous industries, it wasn’t un...
In this test, the LED Lights were PROVEN to substantially surpass Metal Halide Lights in growth. While this test is now somewhat dated, it is this test, which convinced the industry, that LEDs have “now finally arrived” as a useful light for planted freshwater and reef saltwater aquariums....
Rejoices Profound and StillAs we stared beyond the windows thereOver all the gardensThat have never beenAnd will never grow againHow longHow longThe shining winking starsThe clouds too highSo highPointing to some final starThe dull face of the skyAnd the sound of the callingOf the distant vi...
but they couldn't do it for the second time, no matter how they folded and stuck, the fan couldn't do it. At this moment, I saw my deskmate li Ming has looked at the art book unhurriedly, wanted to think, she put
Whether you work at the reception desk, concierge, kitchen or custodial, effective communication matters a lot. Do you provoke? Or do you pacify? Do you complicate things or are you able to make things light and easy? Any role that you take would require communicating skills. INITIATIVE ...
“good drama”. I understand this point of view, and I daresay there are viewers who are intelligent and perceptive enough not to be swayed into believing that the fictional episodes are in any sense true. But I fear that many viewers do believe what they see. In writing this book, I ...
However, this could be a detriment to the fluorescent fixture’s life. Fluorescent lights do work well with motion sensors and dimmers. Plus, when you switch off/on these sensors, it actually decreases the light’s lifespan. So, you might want technology that enables frequent off/on switchin...
Apple currently offers options for Do Not Disturb, personal, sleep, work, driving, fitness, gaming, mindfulness and reading, but you can also create your own custom mode. You can schedule Focus Modes so that they turn on automatically when needed and display your status in apps so that other...
The light source in a flashlight. In most flashlights, the lamp is either a tungsten filament (incandescent bulb) or a light emitting diode (solid state bulb), also known as an LED. The tungsten filament or LED glows when electricity flows through it, thus producing visible light. Tungsten...
"If it's something that's burning away, that you need to do, then do it. Nobody else is going to change the course of your life. That's under your control. You need to take control of it." When you're in a business, keep your head down and stay away from the lights and shi...