Are Light Bulbs Taking Over the Internet?

We wrote an article a few years ago about “li-fi,” an up-and-coming technology that uses light bulbs to transmit a wireless signal. This technology has come a long way since then, and today it’s one of the craziest (and coolest) innovations in the lighting industry! Scientists across the globe (primarily in the UK and China) have been developing this lighting-based data transmission, which could revolutionize the way we connect to the internet.

LED Light Bulb

Conventional wi-fi is emitted using mirowaves or radio frequencies. The great conundrum of physics is that light travels both in particles and waves, a property which also makes it compatible with wavelength data transmission. Although li-fi has been in development for some years now, the most notable recent accomplishment belongs to Chinese professor Chi Nan, who managed to construct a DIY lighting-based data transmitter from basic retail components. (more…)

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5 Ways To Choose An LED Light Bulb

LEDs are at the forefront of light industry discussion because they are such a gamechanger when it comes to energy efficiency and lifespan. But how do recent developments to LED technology affect the everyday consumer? What’s the simplest way to navigate this uncharted territory when shopping for LED light bulbs? The very recent availability of an LED replacement for the common household incandescent lamp has created a world of new potential, and along with it a whole new set of standards. In this post, we will be discussing the various ways to distinguish between the different LED options.

Watts vs. Lumens
image via lumennow.org

1. Light Output

Incandescent lamps have always been measured in watts, because for a really long time people equated the electricity it took to light a bulb with the luminosity it created. So “60 watts” came to mean “the brightness of a 60-watt incandescent lamp,” even though luminosity is measured in lumens, not watts.

With the introduction of more energy efficient lighting, however, this standard doesn’t work. It takes significantly less wattage to produce the same amount of light in an LED or fluorescent lamp, so it’s important for consumers to understand the luminosity of a bulb rather than simply its wattage.

Luminosity, or lamp brightness, is measured in lumens. The chart to the right demonstrates the amount of lumens a standard incandescent light bulb produces, so if you’re used to watts you can easily figure out what lumen count you want in your new LED bulb.

An LED lamp’s packaging or product description might mention how comparable its lumens are to the light output of a 60-, 75- or 100-watt incandescent bulb, but it’s wise to know ahead of time what luminosity you want just in case the incandescent watt-equivalent is not included.

Takeaway: Lumens are how the brightness of an LED light bulb is measured. You’ll choose your bulb based on how bright you want the light to shine, not by how much energy it will be using.

(more…)

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How To Buy LED Light Bulbs (When You’re Used To Fluorescent)

LED Light Bars ShowcaseFluorescent light bulbs are all the rage. Today, the majority of households in the U.S. have begun to adapt their lighting, exchanging inefficient incandescent light bulbs for energy-saving compact fluorescent lamps (CFLs). These familiar spiral-shaped light bulbs hide under our lamp shades, within our ceiling lights, behind our wall sconces, and are quite pleasant to use. Often, you can’t even tell the difference between a classic incandescent and a CFL.

As incandescent lights become a thing of the past, and energy efficient lighting becomes more of a priority, the fluorescent lights have gained popularity.

Fluorescent lights use much less energy to produce the same light output as any incandescent lamp, and they last many times longer. Plus, improvements in fluorescent lighting technology have turned these lamps into a pleasant source to have around your home or work space. The cost upfront isn’t terribly more than an incandescent, either.

Presently, cost and technology make fluorescent lights and LEDs (light emitting diodes) rivals in the energy efficient lighting market. But it won’t stay that way for long. Lighting experts say that while fluorescent lighting technology has reached its peak, LEDs are still evolving and improving. Even now, manufacturers are coming out with new LED lights that surpass fluorescent technology in many different ways.

Let’s examine how fluorescent light bulbs compare with today’s LED light bulbs:

  • Efficiency: While both light sources are considered efficient, LED lights have pulled ahead. A CFL produces 30-50 lumens or light per watt, while an LED on the market today can produce 60-100+ lumens per watt.
  • Rated Life: LEDs and fluorescent lights also both have long rated lives, but again, LEDs win. A CFL can last between 6,000 and 15,000 hours. An LED can last between 25,000 and 60,000 hours.
  • Mercury: Fluorescent lights contain mercury, and LEDs don’t. While operating fluorescent lights on a daily basis won’t put you in danger, a broken light bulb will expose you to a small amount of this toxic substance.
  • Infrared and UV: LED light bulbs don’t emit infrared or UV radiation in the same direction they emit light, but fluorescent lights do. Thus, LEDs will not damage sensitive material, and they won’t attract bugs. (more…)

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Buying LED Light Bulbs (When You’re Used To Halogen)

LED Picture LightWith LEDs, you have so many possibilities. Earlier this week, we published a post about replacing old incandescent light bulbs with LEDs. But, LED light bulbs are much more versatile than that. Their innovative construction makes them great replacements for almost any kind of light bulb.

In this post, we’ll cover how LEDs can replace halogen light bulbs. 

A halogen light bulb is an incandescent light bulb filled with a halogen gas. This gas within the light bulb’s envelope helps the light last longer and use less energy to produce light. There are certainly good reasons to use halogen light bulbs, but these lights also have their shortcomings.

Before we get into how to replace halogen light bulbs with LEDs, we need to understand the pros and cons of using halogen lights:

Halogen Pros:

  • Color Temperature: Halogen lamps emit crisp, flattering light, only slightly cooler than a regular incandescent’s color temperature. The added blue and green tones make a halogen light bulb appear whiter and brighter than the average incandescent.
  • Rated Life: These lights last longer than incandescent light bulbs. A halogen light’s rated life can range from 8,000-20,000 hours, while an incandescent usually lasts around 1,000-2,000 hours.
  • Efficiency: They’re more efficient than regular incandescent light bulbs, generating about 10-35 lumens per watt, compared to about 8-24 lumens per watt.
  • Color Rendering: Halogen lights have a CRI of 100, which means they render colors perfectly. This makes them great for display lighting, accent lighting, and more.
  • Dimming: These lamps still generate light with a filament, so you can use them with standard dimmer switches.

Halogen Cons: (more…)

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Buying LED Light Bulbs (When You’re Used To Incandescent)

LED Light BulbsThere’s nothing quite like the glow of an incandescent light bulb. It’s warm. It’s flattering. It’s familiar.

When you buy an incandescent light bulb, you know what to look for. You know how bright the light will be by looking at its wattage. You know what shape and size to get. You know any incandescent light will work with your dimmer switch.

Incandescent lights are easy. But if you’re still using them in every light socket, things are about to get real. As part of the Energy Independence and Security Act of 2007 (EISA), incandescent light bulbs are slowly being taken off the market. In an effort to conserve energy, consumers are encouraged to use more efficient, longer-lasting light bulbs like CFLs and LEDs.

Long story short: You might have to give up your beloved incandescent lights.

While this change might seem daunting at first, can be a great opportunity to save money on energy bills and light bulb replacements.

But what about that incandescent glow? Or those familiar features? Are they gone forever?

Thankfully, no. After years of research and testing, manufacturers have finally found a way to make LED light bulbs that mimic incandescent light bulbs to near perfection. If you’re looking to replace your filament light bulb with an LED, here’s what you need to look for:

1. For that warm, inviting glow, you need an LED with a warm color temperature. An incandescent’s color temperature is normally around 2,800 degrees K.  (more…)

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How Do LEDs Work?

LED Light Bulb Pegasus LightingThese days, LEDs are everywhere. With their impressive energy efficiency, extra long rated lives, and extraordinary versatility, they’re the lighting world’s new champion.

While it’s pretty easy to figure out what these lights can do, it’s harder to learn how they do it. If you’ve been wondering how exactly LEDs pull it off, just sit back and let this post “illuminate” you.

If you take a look at a single light emitting diode, you’ll notice that it resembles a tiny light bulb. BUT the similarities stop there. LEDs don’t have filaments like regular incandescent lights. Electrons moving across a semiconductor material cause them to create light. To understand this process, you first need to understand the LED’s components:

  • A diode is the simplest kind of semiconductor, which is a material that can conduct electricity. For LED lights, the conductor material is most often aluminum-gallium-arsenide (AlGaAs).
  • To make the semiconductor more conductive, you add atoms of another material, a process called doping. These atoms charge the conductor’s balance, either adding free electrons or providing holes for them to enter.
  • A semiconductor that has extraneous electrons zipping around is called N-type material for its surplus of negatively charges particles. Electrons here proceed from negatively to positively charged materials.
  • A semiconductor full of extra holes is called P-type material. It has, in essence, extra positively charged particles. Here, electrons can hop from one hole to the next, from a negatively charged area to a positive one.
  • A diode needs both N-type and P-type material bonded together, with electrodes on either end. When you connect the N-type side to the negative end of a circuit, and the P-type side to the positive end, the electrons move towards the P-type area. The holes move in the opposite direction, away from the P-type, towards the N-type.

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