The jargon in the lighting world can often get mixed up. Color rending index (CRI) and color temperature are one of the most to be confused with each other. This post is going to clarify what the different between CRI and Color Temperature is so we can end this confusion.

Here is a short explanation why the CRI is more important to focus on before deciding for a color temperature. The color rendering index is the most important feature in certain applications as it determines the appearance of objects, faces and spaces. If this aspect is not relevant, the CRI can be as low as 60 or even 40.

The color rendering index (CRI) is a numeric evaluation of the light color accuracy with the reference of daylight (numbered 100). Sunlight and its broad spectrum will enable a person with normal vision to see 68 different colors in a color chart, but if the chart is illuminated by a light source of one wavelength only, each color from the color chart will appear as a different brightness of that one color. Some activities, such as walking or operating a vehicle, do not require the accurate perception of surface colors while others such as product selections in shops benefit from better color rendering features. Look at the application of the lighting installation. If the visual tasks are easy to perform the CRI doesn’t need to be high. In areas like offices, handcraft manufacturing and surgery, the requirements for visibility, contrast, visual guidance as well as face recognition need to be provided by a lighting system with a good CRI of >80 or even >90.

How much is the light color affecting the space? The term color temperature describes the temperature of objects by which they emit light, modeled through the “blackbody radiator”. When increasing the temperature of a “blackbody”, it starts to emit visible light in a continuous spectrum. The filament of a 60W incandescent lamp heats up to about 3000°F, as a result the lamp emits light with a color temperature of 3000K. Many of our artificial light sources do not create light by heating up a material until it glows like an incandescent lamps. Instead of creating a continuous spectrum, they generate an assortment of color emission lines. A blackbody color temperature cannot be directly given to this non-blackbody type of emission, generated by high intensity discharge and fluorescent lamps for example. For those light sources, a correlated color temperature (CCT) is indicated, based on the blackbody color temperature. A cool white fluorescent lamp has a CCT of about 5000K. The lamps light spectrum is different from a blackbody one but has the same temperature.

The light color influences the atmosphere in a space. The more cozy the ambiance the warmer the light color (lower color temperature) should be and the more dynamic the scene the cooler the light source (higher color temperature). The CRI is the most important factor to watch when choosing light sources. How good is the light source representing faces, colors and contrasts? The easier the visual task and perception the lower the CRI can be. The color temperature needs to be watched second, it is supporting the space’s atmosphere.

Conclusion

There you have it; an explanation of both the Color Rending Index and Color Temperature.

Have anymore questions or thoughts? Comment them down below!

Experts Convey Trends in Lighting

The top trend in decorative lighting has little to do with style, shape or shade choices. Instead, it focuses on the new mindset of the consumer.

“People have realized you’re not buying just a lamp or a sconce or a chandelier — you’re buying an accessory that lights up,” says designer Sergio Orozco.

Decorative lighting rates today as one of the best accessories you can buy. “If chosen correctly, it is as important to a room as your best piece of furniture,” says Orozco, a New York-based furniture and lighting designer. “It reflects your taste and adds the finishing touch.”

Fixed or portable, lighting has become an all-important interior design feature. “Homeowners are beginning to seek out lighting as decorative elements,” says Jody DeVine marketing communications manager for Sea Gull Lighting Products, the New Jersey-based lighting manufacturer.

According to the experts at the American Lighting Association (ALA), there are three major movements:

CASUAL ELEGANCE continues the creation of warm, relaxed and cozy environments, with casual lighting that is a little more upscale in design.

SOFT CONTEMPORARY is still, clean, modern and simple in style. While architectural in design, these fixtures are no longer cold.

SIMPLIFIED TRADITIONAL removes the excess. “While still a traditional look, this look is not ornate,” says Orozco. “There is now a simplification. Decorative lighting here may still be solid brass, but stripped down and rich with an antique patina.”

In step with home decor trends, the lighting industry is experiencing an explosion of design options and material combinations. “Eclectic is really the word that best reflects the range of colors, styles, shapes and sizes of decorative lighting available,” says Joe Rey-Barreau, educational consultant for the American Lighting Association and assistant professor of interior design at the University of Kentucky.

This season’s savviest styles have common design elements. “There has been a big move recently to more daring designs and material combinations — wrought iron with crystal, polished brass with colored glass,” says Rey-Barreau. “At the same time, traditional product is still available. Today, if you want a Williamsburg polished brass fixture, you can find it. But if you are looking for a Murano glass medusa head with a low voltage bulb to light up a room, you can find that, too!”

Finishes range from rich and refined to lustrously weathered. “We are moving away from shiny brass and china to more burnished, brushed and hand painted finishes,” says DeVine.

Hand painted doesn’t mean simply white enamel with painted flowers. Instead, think multi-toned finishes with depth and texture — layers of color; hand-rubbed, burnished metal; finishes flecked with gold or silver and rubbed so color shines through.

“There is also a move toward heavy iron, and rust finishes are still important as is oil-rubbed bronze,” says Kevin Herdt, Certified Lighting Consultant for Austin Bluffs Lighting, a Colorado lighting showroom. “Amber glass is becoming more a preference for homeowners, as well.”

Other fresh features to look for in decorative lighting include:

LARGER SIZE FIXTURES: “More large-size fixtures is a result of the move to larger homes,” says Rey-Barreau. “Homes with large interior volumes need larger lights and the industry has complied.”

CHANDELIER RESURGENCE: Once confined to dining rooms and entry halls, chandeliers are hanging around almost any room in the house. “The trend is back to light in the center of the room,” says Rey-Barreau. “As a result, you are seeing chandeliers everywhere — bathrooms, bedrooms, closets, hallways — anywhere one will fit.”

QUALITY MATERIALS: The focus shifts to the real deal as consumers opt for true glass instead of plastic, stainless steel instead of aluminum. Look for beautiful marble, supple leathers and tactile iron.

LOWER COST: A benefit of recent manufacturing trends is the deflation of price in decorative lighting fixtures. “What cost $1,500 five years ago may be found today for $900,” says Rey-Barreau. “At the same time, there are incredible lamps available for $30.”

ENERGY EFFICIENCY: From adding dimmers to using the latest low-voltage bulbs, consumers are looking to save energy when they can. Cost-effective fluorescent bulbs become more important in all aspects of lighting.

SIDEBAR

DÉCOR LIGHTING

Few things make as much design impact on a room as the right lighting. Whether you choose a portable lamp or installed fixture, decorative lighting melds the best in home fashion with a function. To help you make the most of your decorative lighting, the experts at the American Lighting Association (ALA) offer the following ideas for illuminating your home — no matter what your budget.

FOCUS POCUS: Put lighting to work creating focal points. Add lights to direct the eye in a new direction by focusing on a piece of art, furniture or the mantel.

MOVE IT: Simply moving portable lighting around to new areas can create dramatic differences. Adding or subtracting light from parts of a room creates drama.

COLOR IT BEAUTIFUL: A coat of paint and well-placed lighting can completely change a room. Fresh paint can give an old fixture new look or create the opportunity to add new fixtures to anchor or complement the color.

DIM SOME: Dimmers are another inexpensive trick-of-the-trade. They help set a special mood in the home by allowing you to manipulate the light. Install them at the wall for ceiling fixtures and even buy them for table lamps.

MADE WITH THE SHADE: Today’s shades are made of a variety of shapes, textures and designs. Top off an old fixture with a smart new shade for a fresh look. Add lampshades to chandeliers, or take off the existing lampshades for a fresh face.

START SMALL: You don’t have to redo the whole room to get a whole new look. Dress up fixtures with accessories like candle sleeves, garland or cloth over the chain.

SPACE CASE: Add more drama to a space with accent lighting — illuminate the top a bookcase, add under cabinet lighting or hang a colored pendant over the kitchen island. “You can create islands of light that bring the grain of wood or the print of the wallpaper or the color of a wall to life,” says lighting designer Sergio Orozco.

TABLE IT: “Table lamps are so important, but often ignored,” says Joe Rey-Barreau, ALA director of continuing education. “They are critical to design, they are at eye level and we touch them daily. Move them around the room. If you buy small ones, you can put them on shelves. They make a room more visually complex.”

QUALITY COUNTS: No matter what your budget, opt for timeless materials like bronze and glass over their plastic counterparts. Timeless designs in top materials will always look right and can become family heirlooms.

TEST IT: Try before you buy. “In most instances, you can take a lamp home, try it and bring it back if it doesn’t work,” says lighting designer Sergio Orozco. “Exchange it for one that doesn’t reflect on your glass table or has a different shade.”

DO YOUR HOMEWORK: There is a wealth of information on the Internet, particularly in lighting and decor.  Review your options–from energy-saving innovation to the latest style trend–research new product information to find what will work best for your home or office design.  Consult with lighting professionals to help customize a plan that will illuminate  and enhance your environment effectively, efficiently and decoratively.

Visit a Capitol Lighting showroom or 1800lighting.com for professional lighting advice or a complementary lighting plan customized to your specifications.

Have you ever wondered what it takes to become a top-tier electrician in Columbia, Maryland? Maybe you’re looking for a new, exciting and rewarding career. Or maybe you just want to know what it is that makes Kolb Electric’s certified electricians so darn good at what they do! In either case, the answer to this question is a two-parter.

There is, of course, a practical aspect. Education, training and all of the necessities of being a bona fide electrician. But there are some personality and professionalism requirements, as well.

An electrician has to become highly versed in a ton of information. You may think it’s a lot of “this plug goes here”, and yes, there are some pretty simple connections to make. But electricians actually learn way, way more than just basics. A successful electrician must learn:

As an aside, we would like to point out that if you ever consider undergoing training to be a certified electrician, do not ignore safety and first aid training. A lot of our job is about how to avoid setting ourselves, or others on fire.

Where Do I Start?

There are a few methods of receiving electrician training. Kolb reccomends trade schools or a community college, as there are plenty of them that offer excellent courses in Maryland. Training will involve years of classroom study, practical applications and apprenticeship before you can acquire certification. Sound like a lot? It is, but it is entirely worth it, and everyone needs to know that you’re completely trained!

So aside from the extensive training, what makes a Kolb electrician great at what they do? A lot of it comes down to attitude, willingness to serve well, and professionalism. A successful electrician in Columbia is:

Another important thing to keep in mind as an electrician is that training never ends! Technology is always changing (often very rapidly), and staying on top of all of the latest technology, trends and techniques is one of the primary goals of a successful electrician. Besides, learning new things is fun, and keeps the job interesting!

Our teams at Kolb are extensively trained, highly effective and very skilled at what they do. If you need electrical services including repair, installation, replacement, rewiring or anything else, you can call on Kolb!

Technology giant Google made its start as a search engine, subsequently branching into email, cloud storage, advertising and so much more. Now the company from Mountain View is surging forward with a new application, promising to tell consumers if their roofs are suitable for installing solar panels. The program, called Project Sunroof, works in conjunction with Google Maps to analyze your roof's size, orientation and shade levels to tell you at a glance how much solar energy you could get from it. Read on to learn more about how this convenient software works and how it can help you.

A Mix Between a Solar Electrician and a Search Engine

The program is simple to use – all you have to do is enter your address, and Google does the rest. According to the company, the program analyzes all of the following to determine how much sunlight you can soak up:

The program also provides information about what tax credits are available in your area as well as the local rules regarding selling solar energy back to the utility company when your panels are producing more than you need. It then spits out a recommended installation size, which you can modify based on how much electricity you actually consume according to your average electricity bill.

Pay Nothing and Start Saving Today

Google's entry into the solar market comes at a time when the options for solar are expanding, including the ability to lease panels from solar companies and enjoy savings on your utility bills while paying nothing for the installation and setup. A good setup can last for 30 years or more, with little to no maintenance from an electrician once the installation is completed.

Of course, solar isn't for everybody, since many roofs might be too shaded or otherwise not suitable, and some states still don't have good solar policies. Therefore, Project Sunroof can be a good place to get started to see if your house is a prospect before you even call a solar electrician. Currently, the program is working on a trial basis in Boston, San Francisco and Fresno, with more cities sure to be on the way.

Don't Forget About Human Experts Just Yet

Of course, even a technology company as powerful and ubiquitous as Google can't fully substitute for an experienced solar technician when it comes to analyzing how you can benefit from panels. If a Google query indicates that your home is a good candidate, have a qualified electrician or solar expert make the final determination and help you decide if solar panels are right for you.