I found a great article in the July 2007 issue of Architectural Lighting magazine. The article is about daylight and glazing and is written by lighting icon James Benya. The author does a great job of defining and describing different type of glazing and their interaction with daylight. This is a must read if you are involved with any type of glazing specification.

The links to the article are below:

Part 1 -http://www.archlighting.com/industry-news.asp?sectionID=0&articleID=554032

Part 2 -http://www.archlighting.com/industry-news.asp?sectionID=0&articleID=623836

Part 3 - http://www.archlighting.com/industry-news.asp?sectionID=0&articleID=626636

GE Lighting has a nice feature on their website, gelighting.com, that provides a good method of comparison for source color temperature. The color booth website (click here) provides various images that can be viewed side-by-side, and display scenes lighted with different color temperature sources.

Keep in mind when viewing these images, the actual color that would be perceived by the eye is very difficult to capture with a camera. Additionally, the color settings of the monitor or printer used to view these images may not be calibrated. The comparison method should be used to get an idea of differences between sources, not to actually measure how well a source may render a particular color.

Review - Insight Tre’o

September 24th, 2007 No Comments

Tre’o TCFollowing is a review of a LED based product recently brought to my attention. The Tre’o TC and Tre’o TE by Insight is a linear high output LED based application that may provide a nice uniform distribution of light.

The product features an extruded aluminum body and is available in indoor (Tre’o TC - UL listed for dry locations) and outdoor (Tre’o TE - UL listed for wet locations) variations. The only drawback, is the size of the outdoor product. One of the advantages of LED can be the size of the package. The indoor Tre’o is of the same size to many manufacturers of similar products which have a UL wet listing. I have no doubt the TE will stand up to the elements.

Tre’o TE

Both interior and exterior products are available in 15, 30 and 120 degree distributions and three different output configurations - six, 12 and 15 watts/sq ft. It is unclear through the literature whether Insight is different wattages LED components (same LED spacing on all products), or if they are varying the spacing (further apart, less watts/sq ft). I have seen the 120 degree, 12 watts/sq ft models and they produce a nice uniform wash over the distribution and the light output is impressive. As with most LED products, the actual lumen output (compared to conventional luminaires) is unknown and a comparison between LED and other source technology cannot be made. The Tre’o is manufactured with 2800K, 3200K, 4100K and 5500K color temperatures. The product also offers Red, Green and Blue color schemes with the possibility of 24 bit RGB color changing.

I’m sure this product can be compared similarly to the energy consumption and output of some fluorescent luminaires. Typical for most LED based products, there is a price premium and will make the Tre’o a solution for a select number of applications. Specifically, those requiring longer life/less maintenance or a potentially smaller form factor.

CIE Color Chart

September 13th, 2007 No Comments

Although I am familiar with the CIE color chart, I have never really understood how this chart represents color and the visible spectrum, until now.

The article located at http://www.cs.bham.ac.uk/~mer/colour/cie.html allowed me to understand the basis of this system, truly for the first time.

Color Psychology

September 5th, 2007 No Comments

Color Psychology may not be at the top of the list when it comes to lighting subjects, however, the two are related. Without light, color most certainly does not exist.

I tracked down the following color psychology and association information for my students. This information, coupled with the information being covered in class regarding lighting psychology, should provide design students and broad understanding of what should be considered while designing a space.

The following information comes from an article written by David Johnson and hosted on www.infoplease.com/. You can view the entire article at http://www.infoplease.com/spot/colors1.html.

Black - Black is the color of authority and power. It is popular in fashion because it makes people appear thinner. It is also stylish and timeless. Black also implies submission. Priests wear black to signify submission to God. Some fashion experts say a woman wearing black implies submission to men. Black outfits can also be overpowering, or make the wearer seem aloof or evil. Villains, such as Dracula, often wear black.

White - Brides wear white to symbolize innocence and purity. White reflects light and is considered a summer color. White is popular in decorating and in fashion because it is light, neutral, and goes with everything. However, white shows dirt and is therefore more difficult to keep clean than other colors. Doctors and nurses wear white to imply sterility.

Red - The most emotionally intense color, red stimulates a faster heartbeat and breathing. It is also the color of love. Red clothing gets noticed and makes the wearer appear heavier. Since it is an extreme color, red clothing might not help people in negotiations or confrontations. Red cars are popular targets for thieves. In decorating, red is usually used as an accent. Decorators say that red furniture should be perfect since it will attract attention. The most romantic color, pink, is more tranquilizing. Sports teams sometimes paint the locker rooms used by opposing teams bright pink so their opponents will lose energy.

Blue - The color of the sky and the ocean, blue is one of the most popular colors. It causes the opposite reaction as red. Peaceful, tranquil blue causes the body to produce calming chemicals, so it is often used in bedrooms. Blue can also be cold and depressing. Fashion consultants recommend wearing blue to job interviews because it symbolizes loyalty. People are more productive in blue rooms. Studies show weightlifters are able to handle heavier weights in blue gyms.

Green - Currently the most popular decorating color, green symbolizes nature. It is the easiest color on the eye and can improve vision. It is a calming, refreshing color. People waiting to appear on TV sit in “green rooms” to relax. Hospitals often use green because it relaxes patients. Brides in the Middle Ages wore green to symbolize fertility. Dark green is masculine, conservative, and implies wealth. However, seamstresses often refuse to use green thread on the eve of a fashion show for fear it will bring bad luck.

Yellow - Cheerful sunny yellow is an attention getter. While it is considered an optimistic color, people lose their tempers more often in yellow rooms, and babies will cry more. It is the most difficult color for the eye to take in, so it can be overpowering if overused. Yellow enhances concentration, hence its use for legal pads. It also speeds metabolism.

Purple - The color of royalty, purple connotes luxury, wealth, and sophistication. It is also feminine and romantic. However, because it is rare in nature, purple can appear artificial.

Brown - Solid, reliable brown is the color of earth and is abundant in nature. Light brown implies genuineness while dark brown is similar to wood or leather. Brown can also be sad and wistful. Men are more apt to say brown is one of their favorite colors.

For more information on color psychology, visit Color Psychology written by Kendra Van Wagner and hosted on about.com