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Light Emitting Diodes Bulbs
Y in 2014 we're FORCED to use CFL(Florescent LIGHTS), they're dangerous!...LED R BETTER!?
Does everyone know that it's dangerous using (CFL)Florescent Lights, especially if there is an earthquake? When they break they release Mercury. In large/tall buildings people who survive many die of mercury poisoning from the florescent bulbs! We need to come up w/alternatives...LED lights (light emitting diode)are a plus if we would develop them! What are your thoughts?
http://en.wikipedia.org/wiki/LED
http://www.ecogeek.org/content/view/1243/
http://organicconsumers.org/forum/lofiversion/index.php?t27.html
LED Light Bulbs last longer than even the CFL lights, up to 60,000 hours and considerably longer times are expected soon. LED Light Bulbs are quite expensive, but over a lifespan are comparable with the prices for the CFLs and fluorescents. The high up front costs are compensated for by the low operation costs.
The law doesn't say we have to use CFLs. It bans traditional incandescent bulbs. It doesn't outlaw LEDs. Even though I have used CFLs in my own house for about 10 years I don't like the law. Traditional light bulbs have their place. I still use them in my unheated garage because fluorescent lights are slow to light up when its cold. In some instances light bulbs are used as a low tech, inexpensive heat source. EZ bake ovens will become obsolete if there are no traditional light bulbs to heat them. Fluorescent lights hum and flicker. That flickering makes them a bad thing in machine shops and other environments where workers have to see fine details. The law banning traditional light bulbs should be overturned. We have 6 years to pressure congress. All CFLs are made in China. I don't like a law telling me I have to buy Chinese products. The mercury content doesn't worry me. I never heard of anyone suffering any ill effects from mercury from a broken fluorescent tube. Mercury use has been reduced in so many things that use of CFLs won't push mercury levels past their historic highs.
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10 x 5mm Green 2 Pins Round LED Light Emitting Diode Super Bright Lamp Bulb |  |
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US $.99 | 9d 8h 5m |
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10 5mm 2 Pins 1000 mcd Round Green LED Light Emitting Diode Lamp Bulb | |
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US $.99 | 9d 7h 53m |
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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 16h 1m |
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100pcs 5mm Round Head Diode Bulb LED Light Emitting 7 Colors Slowly High Quality | |
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US $17.89 | 2d 6h 48m |
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50 x 3mm Green 2 Pins 1000 mcd Round LED Light Emitting Diode Lamp Bulb | |
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US $2.49 | 9d 7h 5m |
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New LED Test Box for Light-emitting diode Bulb 2~150mA | |
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US $3.95 | 8d 4h 51m |
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10 x 3mm Green 2 Pins 1000 mcd Round LED Light Emitting Diode Lamp Bulb | |
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US $.99 | 9d 8h 39m |
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20pcs 10mm Blue Emitting Diode Bright LED Light Bulb | |
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US $4.69 | 25d 16h 28m |
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10 3mm 2 Pins 1000 mcd Round Green LED Light Emitting Diode Lamp Bulb | |
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US $.99 | 9d 8h 52m |
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10pcs 5mm Super Bright Round 7 Colors Emitting Diode Bulbs LED Light | |
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US $2.84 | 22d 5h 3m |
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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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Fundamentals of High-Efficiency OLEDS: Basic Science to Manufacturing of Organic Light-Emitting Diodes $126.7 No Synopsis Available |
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Principles of Solar Cells, Leds and Diodes (Hardcover) $306.93 The book will cover the two most important applications of semiconductor diodes – solar cells and LEDs - together with quantitative coverage of the physics of the PN junction at the senior undergraduate level. It will include: Review of semiconductor physicsIntroduction to PN diodesThe solar cellPhysics of efficient conversion of sunlight into electrical energy Semiconductor solar cell materials and device physicsAdvanced solar cell materials and devicesThe light emitting diodePhysics of efficient conversion of electrical energy into lightSemiconductor light emitting diode materials and device physicsAdvanced light emitting diode materials and devices |
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Principles of Solar Cells, Leds and Diodes (Paperback) $148.45 The book will cover the two most important applications of semiconductor diodes – solar cells and LEDs - together with quantitative coverage of the physics of the PN junction at the senior undergraduate level. It will include: Review of semiconductor physicsIntroduction to PN diodesThe solar cellPhysics of efficient conversion of sunlight into electrical energy Semiconductor solar cell materials and device physicsAdvanced solar cell materials and devicesThe light emitting diodePhysics of efficient conversion of electrical energy into lightSemiconductor light emitting diode materials and device physicsAdvanced light emitting diode materials and devices |
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CREE LEDS (Light Emitting Diode)
Can we make incandescent and compact fluorescent bulbs illegal and mandate the use of light emitting diodes?
I suppose that if you are a law maker, you could, indeed, make such a law. Then everyone could walk around looking a blue light on the ground because the lights are too intense to look at.
Problem with LED lighting is that it is not full spectrum lighting. Yeah, we give that up with most lighting, too, but to a lesser degree. LEDs make a blueish light
LEDs are really hard on the eyes to look at yet do not effectively transmit their light over any real distance.
LEDs are GREAT for traffic signals and auto signals as well as other visualization purposes. They just don't do a good job YET for residential lighting.
Find another issue. They are working on mandating compact flourescent lighting, which is acceptable lighting, only making the user sacrifice cost and a second less than "instant on". It will also conserve energy significantly versus incandescent lighting.
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