Hulb Physics Lab

There have been notable contributors to the invention of the LED, including Shuji Nakamura, Hiroshi Amano, and Isamu Akasaki. In the year 1972, the blue LED was created by Herbert Paul Maruska. The latter has used gallium nitride (GaN) on a sapphire substrate (Thompson & Holonyak, 1981). However, the first blue lights denoted inefficiency and did not produce enough light. In the year 1990, Amano and Alaska established Gallium Nitride (GaN) LED at Nagoya University (Akasaki & Amano, 2006). In fact, these developments have transformed lighting of the 21st century, where the LED lamps have replaced the incandescent lamps that were hazardous. The initial highly bright blue LED was developed in 1994 by Shuji

The incandescent light bulb was a phenomenal discovery that occurred during the late 1800’s and was mainly invented by a man named Thomas Edison. It became a recent essential product that we humans use on a daily basis in many more appliances than one. This invention was created in 1890 in New Jersey by Thomas Edison to help people to be able to work during the night after night had fallen and to make people’s lives easier ("Edison's Lightbulb”). It helped many people in an amazing array of different ways, however, everything has it’s disadvantages, and so did the incandescent light bulb ("History of the Incandescent Light.”)

Switching to solar panels will produce 8350 kilowatts per year, with 2 kilowatts per day, comparing to 11,879 kilowatts per year! Canadian citizens can replace standard light bulbs with fluorescent light bulbs. Fluorescent light bulbs use 75 percent less energy and they last 10 times longer! They can produce 17 watts/hour, while emitting much more light than a normal light bulb. (Ballad, T. (n.d.). How Much Do Energy Efficient Bulbs Save? | Home Guides | SF Gate, n.a., (2012.08.23) Top 10 Things You Can Do to Help - Information on Climate Change - Canada's Action on Climate Change.) Another strategy for individuals to help decrease the amount of GHG emissions would be including high-efficiency appliances apart of their lives. With the use of high efficiency appliances, 20 percent energy is being produced. In 2010, 2800 kilowatts were produced in households, and comparing to 20 years ago, 50 kilowatts were saved per year, which is 35 times better. (Appliances | Natural Resources Canada. (n.d) Therefore, Canadian citizens need to do more home at home to decrease the amount of global

LED lighting should reduce energy costs by using at least 75 percent less energy than incandescent lighting. This will save on operating expenses. The maintenance costs

The author erroneously assumed that the cost of LEDs is same as that of the incandescent lamps by just considering its initial cost. What if the maintenance cost of LEDs is more than that of an incandescent lamps? This would not only will make the author’s argument wrong but also will make it baseless .Also the author states that the LED bulbs are brighter than the incandescent lamps what if the bulbs consume more energy than the lamps. The lifetime of both the components is not compared which creates a loophole in this argument because if the LEDs last long then the cost will decrease if they don’t then the cost will increase.

Specific Purpose: To persuade my audience to use more solar power, to save money and help the environment.

I chose the topic do white candles burn faster than colored ones because whenever my mom burns candles, the white candles sometimes tend to burn faster than the colored ones. So for this year’s science project, my essential question is ‘Do white candles burn longer than colored ones?’ I’m going to conduct this experiment twice to test accuracy and just in case, if possible, if I made any mistakes.

These lights give off a bright type of light that will not cause irritation to your eyes. These lights are also long-lasting. In fact, some of these LED lights can last up to 50,000 hours. This is advantageous because you won’t have to replace these lights often, giving you the chance to save some money.

However, when you want to bring your lawn alive with festivity, you don't have to feel like a Grinch, you can accomplish it with energy efficient LED lighting, and save significantly on energy. In addition, the LED strand will outlast the incandescent bulbs by approximately 18,000 hours longer, depending on the brand and quality. LED lighting emits vibrant color, and is cool to the touch, meaning they are safer for live trees. Just ensure you purchase lights rated for outdoor use for outside displays. Our electricians in Huntsville, AL can provide the extra outlets you require for outdoor lighting displays.

“Thomas Edison is usually credited with the invention of the light bulb, but the famous American inventor wasn't the only one who contributed to the development of this revolutionary technology” The story of lights begins long before Edison patented the first working lightbulb in 1879. “The very first working arc lamp was made in 1803 but they were not really successful until 1876 because it kept burning out.” Arc lamps were not for home use they were only for outside use because there was no glass globe around it. So it was danger for home.It is only in the last 100 years that electricity has come into use before then all lights people made were by burning

Commercial LED lights offers businesses with numerous performance, environmental and financial benefits beyond the general energy savings and long life. Studies show that the proper selection of LED lighting improves the comfort of an environment or space. In workplaces, this can boost the employees’ productivity, reduce accidents and improve customer service.

Used LED lightening. “LED lights save money and have a longer life lasting up to 10 years, compared to the previous lighting which lasted two years.” (2)

LPS and HPS lamps have been the standard in parking lot and street illumination for the past 75 years. The differences between LPS and HPS lamps, reside amidst the orange-yellowish color emitted (See samples shown above). LPS illumination emerges as a glowing reddish color on the street sample. Conversely, the image of the house and its illuminance exude as if rising from the ground as an architectural lighting design. The fact is, this is a defect of sodium lights which lose half their illuminance from their objective creating what is called “uplight or skyglow”.

Buildings in the residential, commercial and public sectors are responsible for 20-40% of the total energy consumption in the world [Pérez-Lombard, L. Ortiz, J. and Pout, C., (2008)]. Around 70% of this consumption is spent on artificial light and air-conditioning systems [Energy Information Administration, (2008)]. Especially in office buildings as shown in Fig.1.1 [Guide to Best Practice Maintenance & Operation of HVAC Systems for Energy Efficiency (January 2012)] that the energy consumption due to HVAC is 39% and lighting is 25%. In countries having warm climates like India require cooling of buildings for almost 6-8 months to provide thermal comfort to the occupants. The energy

Even fluorescent lights will soon become obsolete. This is because LEDs, or Light Emitting Diodes, are becoming better and better every day. LEDs work using a phenomenon called electroluminescence, which is the emission of light from a semi-conductor from an electric field influence (How LED Flashlights Are Designed). Two different forms of silicon are used as a semiconductor called N or P type. N-type silicon has extra electrons, and P-type has gaps that seek to have an electron. When an electric current is applied to the P-N junction, it makes the diode forward biased. The electrons go from the N-type to the P-type, which causes photons (particles of light) to be given off as the electrons move to the other side. LEDs produce less heat than any other light