Green Light Essay

Luminance is a physical and objective measure of the intensity of light. The sensation elicited by different luminances is called brightness. However brightness is a subjective measure as it is the perceived amount of light emanating from an object. It may seem logical to expect that luminance and brightness are directly proportional and that two objects that reflect the same amount of physical light into the eye will look the same brightness. However, as this essay will discuss, the apparent brightness of objects is not entirely dependent upon the amount of light received from them and other factors are influential in the way we perceive brightness.

Gas Lighting also has negatives like when Gas light was first invented it was expensive only The wealthy could afford oil lamps in their homes, but the poor had to use candles

The light bulb was an amazing invention when it was first created and it still is today except people overlooked a few things about the first light bulb - also known as the incandescent light bulb. The things that people overlooked on the incandescent light bulb was the fact that it guzzled up so much energy. Another problem with the incandescent light bulb was that it emitted carbon dioxide. One final problem with the incandescent light bulb

14. Different levels of brightness are due to different levels of heat, and different distances.

LED Bulbs: Finally, cut back on your winter energy bill by replacing your old fluorescent lights with LED bulbs for just $5.99 for a packet of two.

Any dark colored vehicle is liable to become hot in the summer sun. How much hotter is the question. Numerous studies and tests have been preformed, the results of each will at the very least agree that the exterior of the vehicle becomes hotter than that of a light colored vehicle. However, this exterior heat does not necessarily translate to a heated interior environment.

The light emitting diodes (LEDs) are low energy, lighting devices with a long lifespan and low energy consumption. The LEDs use specialized power

Today Toronto has over 160,000 streetlight fixtures and ~ 20,000 streetlight classified poles with extended dark fiber to Municipalities, Universities, Schools and Hospitals (MUSH) Sector as likely any eventually passing, if not now, every one of them. Our city is starting to replace all with LED bulbs for a variety of good reason despite some concerns.

The argument that the switch of lights from incandescent bulbs to light emitting diodes (LED) would help Town X reduce the electrical expense and thus save money on electrical costs in the future is a specious one as it fails to consider some compelling evidences.

In the year 2009, there were 39.6 million adults who were 65 years or older. Baby Boomers made up about 12.9% of the population or roughly 1 in every 8 humans. By the year 2030, this number is expected to almost double making 72.9 million adults who are aged 65 years or older making up for an astounding 19% of the world's population. All in all, 5% of the world’s population are in nursing homes. Lighting should be a primary concern to those living in, working in, and designing Nursing Homes.

productive and happier. The large strength and varied colours of artificial lighting can be irritating and

LED’s are different to standard lighting: They don’t really burn out and stop working like a standard light, moreover the lighting diodes emit lower output levels over a very long period of time and become less bright.

Can you ever imagine a world without light bulb? Before light bulb was created, the night can only be lit by the moon and stars. People working and traveling after sunset could only use candles or oil lamps, which caused many inconveniences. Without any bright light, moving inside your own house even seemed dangerous. However, things changed after the ambitious inventors brought their bright idea, which was to light the world, to life. The invention and the commercialization of light bulb not only changed the way people live, but also became a technological breakthrough for future energy use in our daily lives.

CFL lightbulbs entered the market at an expensive price, yet the consumers continued to purchase them. Knowing the bulbs “paid for themselves,” the tradeoff was worth it. They used 75% less electricity than incandescent bulbs, lasted 10 times longer and emitted 450 pounds fewer greenhouse gasses. In previous years consumers relied on incandescent lights that were reliable and much less expensive than CFLs. CFLs were backed by utility companies that also wanted the product to be a success, which was obvious through their coupons, trade-ins and price promotions. Aside from the many benefits CFLs offered to consumers, market research showed there were misconceptions that caused hesitancy in consumer adoption. The original product had problems such as light flickering and buzzing, needed continual usage to result in energy savings, could not be used with a dimmer, and recycling the bulbs was not convenient as special measures were needed to dispose of the bulb.

This report will discuss the advantages, disadvantages and details of both natural daylight and artificial lighting systems in terms of developing within a commercial property. The report provides detailed research and analysis concerning the subject topic in order to give a comprehensive view of various lighting types and methods. Light is an electromagnetic radiation visible to the human eye, the wavelengths visible to humans range between 380nm (nanometers) to 740nm. Light behaves as a wave - it undergoes reflection, refraction, and diffraction just like any wave would.