LED Tv Purchasing Considerations

Because of their many advantages over traditional incandescent and fluorescent light bulbs, Mini LED TV are poised to transform all forms of lighting. Selecting and purchasing LED lights requires buyers to learn new terminology and take into consideration factors that they don’t have to think about when buying traditional types of lighting. This brief article provides some basic background and purchasing considerations for first-time buyers of LED replacement lights.

As most people probably know by now, LED stands for light-emitting diode. LEDs are actually semiconductors (just like computer chips) that produce light more efficiently than traditional light sources. When electricity is passed through them, they emit energy in the form of light. These semiconductors are doped or injected with chemicals that determine their light color. LEDs convert the majority of energy passed through them to light, as opposed to incandescent bulbs that produce light as a by-product of being heated. For this reason, LEDs can be up to 90% more efficient than traditional household filament light bulbs.

LEDs have been widely used in as displays and indicator lights for nearly 40 years. Only recently, though, have engineers figured out how to make and mass-produce bright, white LEDs that can be used for general-purpose lighting. The high brightness and point-source characteristics of LEDs have made them the first choice for traffic lights and car tail lights, where visibility and dependability are essential.

So, what should you know when purchasing LED lights bulbs? The following list provides some basic guidelines:

1. While the initial cost per bulb is still high, the total lifetime cost of an LED light bulb is actually lower than that of equivalent incandescent and CFL bulbs. Taking into consideration energy costs as well as time and resources required to replace incandescent and CFL bulbs, an LED bulb that lasts 80,000 hours has a much lower lifetime cost.

2. LEDs are diverse, and – as unlucky purchasers are all too likely to find out the hard way – many types are useless for general lighting applications. The finest LED chips emit light with a Color Rendering Index (CRI) of 85%. The CRI, by the way, is a quantitative measure of the ability of a light source to reproduce the colors of various objects faithfully in comparison with an ideal or natural light source. LED light bulbs that use top-quality LEDs will last much longer than the novelty bulbs that many are selling and 60% longer than many competing bulbs that use inferior LEDs.

3. Contrary to what you may read some places, LEDs do generate heat, and this heat is actually the biggest problem that manufacturers face developing LED lighting applications. Manufacturers can now produce individual LED chips that are as bright as a 100-watt incandescent bulb, but these LEDs are practically useless for general lighting because installing them in a fixture creates ventilation problems that have not yet been solved. LEDs installed in fixtures and bulbs must be ventilated properly, and the better the chip, the more difficult it is to properly cool. There are many LED light bulbs on the market that do not take this into consideration and either use cheap chips so they don’t have to ventilate them, or do not ventilate their chips properly, significantly reducing its lifespan. While the typical LED light bulb is barely warm to the touch, if the chip is not properly ventilated, it can fail prematurely.

4. While LED light bulbs do last much longer than conventional bulbs, look closely at manufacturer claims for bulb life. The life-span of an LED light bulb should be its “half-life.” LED light bulbs do not burn out; rather, they gradually fade out. When a vendor says an LED bulb will last 80,000 hours, they mean that at that point, the chips will have reached 50% efficiency, and the bulb ought to be replaced. So, the bulb might last 100,000 hours or more, but its efficiency will have degraded greatly by that point. Using this 100,000-hour life as a selling point is therefore misleading. While LEDs don’t last forever, they will last 50-75 times longer than a comparable incandescent and 6-8 times longer than a CFL.

5. Searching the web, you will quickly find that the LED light bulb market is inundated with product. Many of these bulbs are relatively inexpensive (less than $20); however, you may find that many of these LED bulbs consist of questionable materials and dubious craftsmanship. Good LED light bulbs cost more than these cheap ones because they use high-quality chips with prices firmly set by reputable manufacturers like Cree. This means that though these LED light bulbs are more expensive, they are far superior.

6. LED light bulbs can’t be dimmed with traditional dimmers. LEDs require constant current to operate. Because of this, if a standard dimming method is applied, it will flicker at regular intervals, or worse, simply not work. In order to dim an LED light, a 0-10V dimming module is required in order to “trick” the LED into emitting less light. In theory, all LED lights are dimmable with this module.

7. When comparing LED light bulbs, you need to understand lumens. The lumen is a standard unit you can use to compare LED light bulbs to standard bulbs, such as incandescents and halogens. Roughly, a lumen is a measure of brightness. Lumen quantity is important, but maybe more important is lumen quality, i.e., luminous efficacy (lumen/Watt). Today’s quality LEDs have a luminous efficacy between 60-70 lumens/watt.

8. Color temperature and beam spread are the other key tools for comparing LED lights. Both color temperature and beam spread are measured in degrees. Color temperature refers to the color of the light emitted. In general, 3000 Kelvin is warm white (closer to infrared light) and 5000 Kelvin is cool white (closer to ultraviolet light). Cool white is brighter because it is the natural color of LED light, whereas chips that emit a warm white light require a phosphorous “filter” to “warm” the color temperature, thus reducing the chip’s brightness. Beam spread is the angle of the light that is being emitted. The lower the number, the more like a “spot” the light is.

Top 12 Things to Do for Free in Los Angeles

As the largest city on the West Coast and home to Hollywood, the City of Angels may seem like a playground Google TV for the rich. Appearances, however, can be deceptive. As many tourists and visitors to the city find out, Los Angeles has a ton of activities lined up for you that do not make a dent on your wallet. In the following selected list, you will discover the top 12 things to do for free in Los Angeles.

1. Rodeo Drive

This is an exclusive shopping district featuring exotic brands and exclusive privately managed boutiques. Rodeo Drive was made memorable by the venerable Julia Roberts in the movie Pretty Woman. Ever since, hordes of visitors visit the place to catch a glance of their favorite celebrities and browse the stores. There is no compulsion to shop, and most of the store owners are used to tourists.

2. Griffith Observatory

Located atop the south side of Mount Hollywood, the Griffith Observatory offers a stunning view of the city and the adjacent areas. While the planetarium shows cost money, visitors can enjoy the spectacular hiking and biking trails and make use of some of the best photo-ops at this massive urban park. Other attractions include the zoo and botanical gardens, the iconic Hollywood sign, and an impressive museum of selected exhibits.

3. Venice Beach

When it comes to free Los Angeles activities, a trip to the iconic Venice Beach is among the top attractions. While Venice the city is inspired by Venice, Italy, the beach has now acquired a distinct Californian identity of its own. Scores of tourists come to the beach to enjoy sunbathing, the famous boardwalk, and a chance to look at all the funky and eclectic characters around.

4. Santa Monica

It’s not an overstatement to say that the beach at Santa Monica is among the most iconic in the US. Visitors to Santa Monica are rarely short of activities and things to see with some of the most eye catching street performers, spectacular nightlife, and soft sandy beaches on offer. The famous pier and the Ferris wheel are also worth mentioning.

5. Getty Center

Top 12 Things to Do for Free in Los Angeles-5Designed by the legendary Richard Meier, the Getty Center is undoubtedly one of the most famous architectural landmarks in America. The center is home to some of the most sublime works of arts from across the globe. Whether it is Baroque sculptures or Renaissance artworks, visitors can look forward to some of the most delightful and intriguing masterpieces at the Getty Center. The magnificent views of the city are an added bonus.

6. Hollywood Walk of Fame

Visitors to Los Angeles will miss something if they don’t take the opportunity to soak up the atmosphere at the Hollywood Walk of Fame. Consistently rated among the most fun things to do in LA for free, the Walk is the who’s who of Hollywood. As a bonus, you can also visit the TCL Chinese Theater where some of the most iconic Hollywood movie star hand prints and signatures can be found.

7. Walt Disney Concert Hall

This is yet another architectural masterpiece right in the center of downtown Los Angeles. This Frank Gehry masterpiece is credited with transforming the cultural landscape of the otherwise dull downtown LA. Visitors can choose to listen to the Los Angeles Philharmonic Orchestra or simply take a guided tour of this venue which is offered for free.

8. Sunset Boulevard

This magnificent location has been immortalized in a number of Hollywood movies. Clearly one of the most recognized thoroughfares in the US, the Sunset Boulevard offers visitors a peek at the glitzy lifestyle of Hollywood’s who’s who. This charming palm-fringed strip has now transformed into a lively nightlife hub with several eateries and live performance centers.

9. Hollywood Bowl

The Hollywood Bowl is a lovely outdoor Amphitheater that has been graced by some of the biggest names in the world of music including the Beatles and Madonna. Visitors can look forward to an outstanding musical experience in this surreal setting. In addition, the museum at the venue has impressive artwork and memorabilia showcasing its history.

10. Runyon Canyon Park

For those who cannot get enough of trails and views to die for, there is no better place than Runyon park. Located minutes away from the Hollywood Boulevard, visitors to the park can look for sweeping and expansive views of the Pacific and the San Fernando valley.

11. Grand Central Market

This is a downtown LA foodie’s paradise with over 30 vendors serving up food from tacos to ramen noodles. Plus, it is open every night until 10 pm so there are plenty of places to enjoy a late dinner or grab a craft brew.

12. Bradbury Building

It is the oldest commercial building left in LA but that’s not why this building is a tourist attraction. With its beautiful, light-filled central atrium that rises almost 50 feet high, marble stairs, and ornate iron railings, the Bradbury Building has been featured in many films, most notably in Bladerunner and (500) Days of Summer.