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Light Emitting Diodes Light Bulbs
Which type of light bulb produces the best quality light?
Standard incandescents, compact fluorescents, or LEDs (light emitting diodes?) Does it all come down to a personal preference, and if it does, which is the most widely used, popular type?
Thank you! I appreciate your time and help on my science project.
depends on your definition of quality light.
and even within one category, there are lots of variations. CFLs, for example, can be purchased as "cold" or "warm" which shifts the spectrum.
Incandescents are the only one that radiate in a continuous spectrum, but the percentages of energy in various portions of the spectrum can vary.
I think it's a matter of preference.
I don't think people buy bulbs for the type of light, but for convenience, and cost savings, and price.
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100pcs 5mm White Red Blue Green Yellow Round LED Light Bulb Emitting Diode Lamp |  |
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US $.99 | 11d 15h 56m |
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20pcs 10mm Blue Emitting Diode Bright LED Light Bulb | |
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US $4.69 | 25d 16h 24m |
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10pcs 5mm Super Bright Round 7 Colors Emitting Diode Bulbs LED Light | |
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US $2.84 | 22d 4h 58m |
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100pcs 5mm Super Bright Round Emitting Diode LED Light Bulbs Assorted Colors | |
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US $4.79 | 4d 1h 38m |
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100 PCS 5 mm Round Superbright Blue Light Emitting Diode LED Light Bulbs | |
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US $5.99 | 13d 1h 46m |
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100x 5 mm Emitting Diode LED Light Bulb Round 2000MCD | |
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US $3.99 | 28d 11h 51m |
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100 pcs 5 mm Round Superbright Yellow Light Emitting Diode LED Light Bulbs | |
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US $6.29 | 12d 19h 51m |
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100 PCS Blue LED Lights Round LED 5mm Light Emitting Diode Bulbs LED Lighting | |
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US $5.99 | 9d 17h 30m |
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100 PCS White Round LED 5mm Light Emitting Diode Bulbs LED Lights | |
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US $5.99 | 8d 17h 39m |
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10pcs 5mm Super Bright Round 7 Colors Emitting Slowly Diode Bulbs LED Light | |
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US $3.41 | 22d 4h 58m |
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Light-Emitting Diodes (Hardcover) $186.1 Revised and fully up-dated, the second edition of this graduate textbook offers a comprehensive explanation of the technology and physics of LEDs such as infrared, visible-spectrum, ultraviolet, and white LEDs made from III-V semiconductors. Elementary properties such as electrical and optical characteristics are reviewed, followed by the analysis of advanced device structures. With nine additional chapters, the treatment of LEDs has been vastly expanded, including new material on device packaging, reflectors, UV LEDs, III-V nitride materials, solid-state sources for illumination applications, and junction temperature. Radiative and non-radiative recombination dynamics, methods for improving light extraction, high-efficiency and high-power device designs, white-light emitters with wavelength-converting phosphor materials, optical reflectors, and spontaneous recombination in resonant-cavity structures are discussed in detail. With exercises, solutions, and illustrative examples, this textbook will be of interest to scientists and engineers working on LEDs and graduate students in electrical engineering, applied physics, and materials science. |
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Light-Emitting Diodes $87.75 No Synopsis Available |
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Organic Light Emitting Diodes (Hardcover) $385.4 Addressing the development of the organic light emitting diode (OLED) based on rare-earth and transition-metal complexes—Europium, Terbium, Ruthenium, and Rhenium—this unique perspective explains how these materials can be used to build organic-LEDs, from chemistry synthesis to device operation and the related charge transfer and confinement. Examining how organic materials can be used to build organic-LEDs, the relationship between the chemistry molecule "design," and state-of-the-art and expected pathways, this intelligent report provides intensive experimental results for scientists and engineers working in this new OLED framework, while maintaining a didactic utility for graduation students and teachers studying optoelectronics. |
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Polymer Light Emitting Diodes Based on Polyfluorenes $138.61 This work is devoted to the study on Polymer Light Emitting Diodes (PLEDs) based on polyfluorenes, a promising class of semiconductive polymers for lightemitting diode applications. It covers theories of PLEDs, literature overview of polyfluorenebased lightemitting diodes, as well as research results by the authors. In this study, several types of PLED devices based on neat polyfluorenes or polyfluorene blends were designed, fabricated, and characterized. The electrical characteristics of two neat polyfluorenes were simulated via using space charge limited current theory for the holeonly case and/or exploiting a commercial software package. Author: Zhang, Qiushu/ Zivanovic, Sandra Binding Type: Paperback Number of Pages: 164 Publication Date: 2010/08/16 Language: English Dimensions: 5.98 x 9.01 x 0.37 inches |
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Light-emitting Diodes and Optoelectronics (Hardcover) $369.61 Description not available. |
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Electroluminescence in Organic Light-emitting Diodes $80.93 No Synopsis Available |
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Blue Laser and Light Emitting Diodes II $95.55 No Synopsis Available |
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Organic Light-Emitting Diodes: Principles, Characteristics & Processes $233.95 No Synopsis Available |
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Organic Light Emitting Diodes : The Use of Rare Earth and Transition Metals $146.2 No Synopsis Available |
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Introduction to Nitride Semiconductor Blue Lasers and Light Emitting Diodes $204.7 No Synopsis Available |
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CarbazoleBased Emitting Compounds $141.79 Carbazole is a heterocyclic tricyclic aromatic organic compound consisting of two sixmembered benzene rings fused on either side of a fivemembered nitrogencontaining ring. A large number of carbazole derivatives have been designed and synthesized and organic electronic devices based on these derivatives such as organic light emitting diodes (OLEDs), have been investigated. The optical and electrical properties of carbazoles are affected by substitution on the 2, 3, 6, 7 and 9Hpositions. Many carbazole derivatives have sufficiently high triplet energy to make them an efficient host where they can serve as red, green, or blue triplet emitters. Highly fluorescent and stable carbazolebased compounds were synthesized and characterized. Substitution of carbazoles at 3 and 6 position by tertbutyl group enhanced the solubility. Suitably susbtituted carbazoles form highly stable fluorescent organic nanoparticles. The emission of these nanoparticles was reversibly switched on/off in the bluegreen and orangered regions from a change in the ratio of the tetrahydrofuran/water system used in their preparation. Author: Adhikari, Ravi/ Neckers, Dr Douglas C. Binding Type: Paperback Number of Pages: 192 Publication Date: 2010/05/05 Language: English Dimensions: 5.98 x 9.01 x 0.44 inches |
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Pharox MR16 LED Bulb by Lemnis Lighting $39.99 Low voltage meets low wattage. The Lemnis Lighting Pharox MR16 LED Bulb replaces standard 35 Watt halogen spots, emitting all the brightness and light quality of that halogen bulb, while using only 5 watts. It also features a comparable 38 degree beam spread, making it particularly ideal for retrofitting halogen spots in low voltage monorail installations. Dutch light bulb manufacturer, Lemnis Lighting, is a forerunner in the field of sustainable LED lighting solutions. They specialize in high quality LED light bulbs--such as the Pharox line--that have long life spans, use minimal energy and cost little to maintain. Lemnis Lighting encourages the transition toward energy efficient lighting without compromising the welcoming warmth of classic bulbs. The Lemnis Lighting Pharox MR16 LED Bulb is available with the following: Details:Type MR16 LED bulbGU5.3 base5 Watts12 VoltsDimmableEmits no harmful UV radiationGenerates virtually no heatContains no mercury or leadTurns on instantly without flickering38 degree beam spreadColor Temperature: 3100KCRI: 85280 lumens (output equivalent to 35 Watt halogen)Average Rated Life: 25,000 hoursPlease Note: The Pharox MR16 LED Bulb requires the use of an external transformer. Because of the particularly low wattage used by this bulb, Pharox recommends the use of a magnetic transformer for safe, hum-free and flicker-free operation. Shipping: This item usually ships within 1 to 2 business days. Dimensions: Bulb: Height 1.77 In., Diameter 1.97 In. |
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Flute Task Lamp by Herman Miller $249 Flexible, versatile, compatible, economical. The Herman Miller Flute Task Lamp leaves a minuscule carbon footprint on the earth, its composition made up of 36% recycled materials, 85% of which can be recycled at the end of its lifetime. Weighing in at just two pounds, this task light also leaves a small footprint on your desk. So many great things to say about such a little light, you'll have to read the details to get all the info! The Flute's base features 360 degree adjustability and the head swivels up to 230 degrees. Its LED technology means an ample amount of friendly medium-warm illumination for any task. Also reduces energy consumption by 40 to 50%, compared to traditional bulbs, emitting no carbon dioxide, mercury or sulfur like traditional light bulbs do. Feel free and touch to turn it on or off and move it about at will--an integrated heat sink means Flute stays cool to the touch so there's no fear of getting burned. What's more, the Flute has an estimated 24-year life span and an annual energy cost of about $1.13--less than a single cup of coffee a year, and way less than a latte. All in all, the Flute is the whole package with an earth-conscious, ergonomic design made for the modern man or woman. Since its early beginnings in 1905 (then known as the Star Furniture Company), Herman Miller has stood as one of the leaders in ergonomic furniture design and manufacture. Today, with a strong focus on designing furnishings with excellent form and function, this Michigan-based company produces a variety of home and office products that improve the human experience wherever people work, create, learn and live. The Herman Miller Flute Task Lamp is available with the following: Details:Manufactured from 36% recycled materialHead swivels 230 degreesFreestanding base360 degree rotating clamp mountOn-off touch controlConsumes 30 to 50+% less energy than traditional task lights5.2 watts of energy to provide 31 lumens per watt +60,000 hour life span (24 years with average use)85% recyclableUL ListedDesigned by Tom NewhouseMade in the USAOptions:Finish: Graphite Satin, Metallic Silver, or White.Lighting: 5.2 Watt 120 Volt LED lamp (included). Shipping: This item usually ships within 10 business days. Dimensions: Fixture: Extension 19 In., Height 14.75 In. Base: Diameter 6 In. |
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Fundamentals of High-Efficiency OLEDS: Basic Science to Manufacturing of Organic Light-Emitting Diodes $126.7 No Synopsis Available |
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Philippe Island Light by Corbett Lighting $2404 The Corbett Lighting Philippe Island Light adds a touch of elegance in a design that will ornate your ceiling with an intricate carved design while emitting an alluring ambience in the room. The Philippe Island Light features French Ice glass shades and hand-crafted iron body. Corbett Lighting has been creating and manufacturing beautiful lighting for more than 40 years. Their products clearly demonstrate Corbett's dedication to original design and superior craftsmanship, combined with the finest glassware, shades and natural material. Solid brass castings, Italian glass, hand-forged iron and hand-painted finishes are just a few of the quality materials used in Corbett Lighting fixtures. The Corbett Lighting Philippe Island Light is available with the following: Details:French Ice glass shadesHand-crafted iron bodyOne ceiling canopyTwo chainsUL ListedOptions:Finish: Parisian, or Tahitian Bronze.Number of Lights: 2 Lights, or 3 Lights.Lighting:2 Lights option utilizes two 100 Watt 120 Volt Medium Base Incandescent lamps (not included).3 Lights option utilizes three 100 Watt 120 Volt Medium Base Incandescent lamps (not included).Shipping: This item usually ships within 3-4 weeks. Dimensions: 2-Light Option: Width 17 In., Length 38 In., Height 28 In. 3-Light Option: Width 17 In., Length 58 In., Height 36 In. |
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Spillray Multi-Light Pendant by AXO Light $2010.4 The AXO Light Spillray Multi-Light Pendant seems to twinkle with light as small halogen bulbs illuminate each Pyrex glass shade and create beautiful shapes throughout a space. These upside-down goblets, each a different size, make for a stunning centerpiece over the contemporary dining room table. Italy's AXO Light combines traditional Venetian glasswork and artisan craftwork with avant-garde lighting techniques and innovative materials. Their design philosophy is clear: use creativity and inspiration to create stunning lighting replete with value and emotion. The AXO Light Spillray Multi-Light Pendant is available with the following: Details:Pyrex glass shadesMetal supportsChrome finishRectangular ceiling canopy with individual circular platesTransparent cablesLow voltageIncludes transformerETL ListedDesigned by Manuel VivianOptions:Number of Lights: 6 Lights, or 10 Lights.Shade: Crystal, Grey, Orange, or Red.Lighting:6 Lights option utilizes six 20 Watt 12 Volt Low voltage Type G4 Halogen lamps (not included).10 Lights option utilizes ten 20 Watt 12 Volt Low voltage Type G4 Halogen lamps (not included).Shipping: This item usually ships within 8-10 weeks. Dimensions: 10-Light Option: Depth 7.5 In., Width 38.63 In., Overall Hanging Length Adjustable to 47.25 In. 6-Light Option: Depth 7.5 In., Overall Hanging Length Adjustable to 47.25 In., Width 24 In. 6-Light Ceiling Canopy: Width 25.38 In. 10-Light Ceiling Canopy: Width 41.13 In. |
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The LED Energy Saving Light Bulb by Walt Barrett
Is there a fundamental difference between an LED and a light bulb?
Is the difference between a light emitting diode and an incadescent light bulb simply that one uses more electric current to cause a substance to give off photons or is there a more fundamental difference in they way photons are produced in each of them?
Sake Bomb: so whats the difference between a "chip" and a "filament". I know what a chip is and I know what a filament is. My question is asking is there a fundamental difference in the way or manner in which photons are produced using an electric current (something common in this case to both the chip and the filament).
Leanne: again, to address the question I posed, I'm not asking what is the physical difference as I know what a pn junction chip is and I know what a glass bulb with a filament is, what I'm asking is in what manner of using electric current to produce photons are they different. Aren't they both simply using current to drive photons out of the atoms? So what's the difference? Or is there any?
A common light bulb uses electric current to heat a filament to incandescence - most of the energy is waisted as heat energy and very little is given off as light. Typically, they are 3 or 4 percent efficient at producing visible light.
A LED, on the other hand, is a solid state device witch emits light in a narrow spectrum from the p-n junction of the diode. It is far more efficient with a lot less wasted energy in the form of heat.
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