Lighting. Saturday , September 22nd , 2018 - 04:49:39 AM
The seemingly straightforward task of choosing a light bulb has however become a bit of a mine field in recent years. The plethora of light bulbs and lighting technology on the market and the rapid pace of development in the industry is both cause for consumer celebration and caution. Greater range of choice gives consumers unprecedented freedom but also means it is more important than ever to choose the right light bulb for the right application. Comparing lumens per watt values is an easy way to identify the most "light" efficient lamp in terms of brightness. But to work out which lamp type is best for a specific application in terms of energy efficiency the following things need to be considered: wattage, lamp life, daily use, lamp cost and lighting output required. The best way to do this is with an energy saving calculator. By entering specific values you can compare your current light bulbs with those you are considering replacing them with and make an informed lighting decision based on an energy saving forecast.
Now we can take the color of our light source that we are looking at and compare it with the Color Rendering Index (CRI). The CRI of a light source compares the color of the source to a Black Body color index of the same color temperature. The maximum Color Rendering Index number that is possible is 100. The higher the CRI of your light source the more natural colors will appear when illuminated by it. Light sources with a low CRI will distort the colors that are viewed with them.High (above 80) CRI is preferred in the home. ENERGY STAR requires that qualified fixtures have lamps with CRI above 80. Daylight and all incandescent and halogen light sources have a CRI of 100 and they are excellent at rendering color. For a warm lamp, the CRI is a measure of how close to incandescent color it is, and for a very cool lamp the CRI is how close to daylight it is. The lamps CRI should be listed in the Manufacture's literature.
These measurements of our light source are very useful when considering what we want our light to highlight most in the room. They help us decide what colors are needed to bring out our accents. Maybe there is a feature that needs to be hidden or displayed in a more creative way and choosing the correct light source can allow you to be more artistic with that color and the space available.
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