Around the world, every city offers something different. Though they all have hustle and bustle, lots of buildings, and usually traffic, when you’re on their streets you would never mistake San Francisco for Cairo, Toronto for Tokyo, or Berlin for Rio de Janeiro. But what about from space? During the day, these cities tend to blend in with their surrounding countryside. However, when lit up at night, it’s easy to see how varied these cities can be.

Is it possible to tell anything about the life and culture of our cities when viewing their lights from above? You might be surprised at how much.

Landmarks

Can you guess which cultural icon jumps out of this landscape?

Now, take a look at this photograph of Denver, a much newer city. The streets are mapped out in a much more orderly, grid-like way, aligned North-South and East-West.

The majority of urban areas in Tokyo use green mercury vapor lamps. Only the most newly built areas glow the standard orange.

Development

When examining a city’s lights from above, you can also learn about development, community growth, and infrastructure. Check out this unique photo of two cities from two countries side-by-side – the border towns Cuidad Juarez, Mexico and El Paso, Texas.

Are you living in a home that was built before 1950? If so, you may have a potential fire hazard on your hands that you cannot see. Wiring in older homes is often an antiquated system know as insulated cloth wiring. While it may be perfectly safe in some houses, it can lead to problems down the road. If you are not sure if you have cloth wiring, you will want to call an electrician. Los Angeles homeowners can rely on The Electric Connection to provide prompt service.

An electrical safety inspection will determine whether your home has cloth wiring and whether or not it should be replaced. If you are noticing problems with the power in your home, like lights flickering, outlets not working and etc…it may be an indication the protective cloth around the wires is fraying. Overtime, the cloth becomes brittle and decays. This ends up leaving bare wires that can certainly become a major risk.

Your electrician in Los Angeles will be able to advise you the best course of action to take. If you are planning to do any remodeling or upgrading light fixtures, it is highly recommended you replace the old wiring in your home. During the inspection, the electrician can also check for the old knob-and-tube wiring. This is more common in homes built before 1935. This type of wiring involved the use of ceramic tubes and knobs. It is not safe and is not allowed in new construction anymore.

If you suspect your older home may have either one of these types of wiring, it is certainly better to be safe than sorry. Home fires started by faulty wiring are a preventable tragedy. The professionals at The Electric Connection are ready to help you make this big decision. Give us a call today to schedule your inspection.

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!

When you are using an electronic device and need to charge it, you look for the closest power point to plug it in. There are times when you just can”t find a plug point within easy reach; that’s when you look for an electrical extension cord and plug in the device you need to charge.

This is something most of us do as a matter of routine and we don’t give much thought to it. Extension cords are undoubtedly a very handy tool that solves some very basic charging problems. When there is a shortage of outlets or if an electronic device is just a little too far from the closest electrical point, these extension cords prove very useful.

However, it’s important to keep in view the fact that an extension cord isn’t meant to be a permanent electrical fixture; it’s to be used for a specific reason and it can be hazardous to use them incorrectly.

Here, we talk about the different hazards of electrical extension cords and how they can be avoided: