Lighting. Friday , September 21st , 2018 - 15:14:40 PM
To review a Color Rendering index is a comparison of our light source with an index of the same color temperature. A Correlated Color Temperature (CCT) is described in degrees Kelvin, and it is a comparison of our light source against a standard base line color model that has radiant power at all wavelengths Now we have talked about color temperature and the Color Rendering Index of a light source. In order to get a good picture of what the light source is going to do in our lighting design we need to consider both of them together. For example you can have two or more light sources with the same color temperature and they could be called warm but they render object colors differently. You can have Light sources with the same Color Rendering Index but different Correlated Color Temperatures and they could also render the object color differently. In order to get a more complete picture of how a light source is going to react to a surface you need to use both the Color Rendering Index of the light source and the Color Temperature of the light source together.
Where LED lights really shine though is in light output and electrical efficiency. A typical incandescent bulb produces about 17 light lumens per watt at best. Most of the electrical energy fed to the bulb is radiated as heat, resulting in a very inefficient and wasteful light source. LEDs, on the other hand, produce anywhere from 60 to 100 lumens per watt. Very little energy fed into the LED is radiated as heat, resulting in a very efficient light source that can produce a lot more light than an incandescent while using far less electrical power. Considering the importance of navigation lighting and the need to conserve power on a boat, this is an extremely attractive benefit. You can use less power, yet produce a much stronger nav light signal, improving your visibility to other boats while reducing power consumption at the same time. On smaller boats, you could run a basic set of navigation lights all night and still not deplete your batteries. Increased safety and increased efficiency, all from a simply change in light sources!
General (ambient) light: This refers to the overall level of light provided in a living space so that it is visible and safe for its intended use. In many cases, general light is provided via overhead ceiling lamps. Another common practice is to use recessed lighting along the walls or as part of the ceiling trim. Task light: This is typically a focused light source that illuminates a work area such as a desk, lab bench, or kitchen island. Such light may be provided in the form of a lamp, pendant fixture, or track light. In some cases, a task light may be recessed; for example, the light may be mounted under a kitchen cabinet so that it is not visible from the kitchen counter space.
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