Compact Fluorescent Lighting in America: Lessons Learned on the Way to Market
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Compact Fluorescent Light Bulbs
Compact Fluorescent Light Bulbs What is a compact fluorescent lamp (CFL) bulb? A CFL bulb is a type of fluorescent bulb that screws into a standard light socket, such as a lamp or ceiling light fixture. CFLs use much less energy and last up to 10 times longer than standard light bulbs. What is in a compact fluorescent lamp (CFL) bulb? A CFL bulb is made of glass, a ceramic and metal base, a luminous powder called phosphor, and a small amount of mercury. How much mercury is contained in a CFL bulb? Manufacturers report that the amount of mercury contained in a CFL bulb is five milligrams, which is less than two ten-thousandths of an ounce. The mercury could be in the form of an invisible vapor or in a bead the size of the period at the end of this sentence. A mercury fever thermometer contains about 100 times more mercury than a CFL bulb. Is it harmful is it to be in the room where a CFL bulb has broken? The amount of mercury vapor that is released from one broken bulb is not enough to make anyone sick. However, it is best to avoid any exposure to mercury. We recommend that you ventilate the room air to the outdoors by opening a window or a door and leave the room for a few hours before cleaning up the broken bulb. How should I clean up a broken CFL bulb? It is not necessary to hire a professional to clean up the bulb. By following the directions below, you can safely clean up a broken CFL bulb. -
Fluorescence Spectroscopy and Chemometrics in the Food Classification − a Review
Czech J. Food Sci. Vol. 25, No. 4: 159–173 Fluorescence Spectroscopy and Chemometrics in the Food Classification − a Review Jana SÁDECKÁ and Jana TÓTHOVÁ Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology, Bratislava, Slovak Republic Abstract Sádecká J., Tóthová J. (2007): Fluorescence spectroscopy and chemometrics in the food classification − a review. Czech J. Food Sci., 25: 159–173. This review deals with the last few years’ articles on various fluorescence techniques (conventional, excitation-emis- sion matrix, and synchronous fluorescence spectroscopy) as a tool for the classification of food samples. Chemometric methods as principal component analysis, hierarchical cluster analysis, parallel factor analysis, and factorial discrimi- nate analysis are briefly reminded. The respective publications are then listed according to the food samples: dairy products, eggs, meat, fish, edible oils, and others. Keywords: chemometrics; fluorescence spectroscopy; food analysis Fluorescence spectroscopy is a rapid, sensitive, distinguish. The analytical information contained and non-destructive analytical technique pro- in fluorescence spectra can be extracted by using viding in a few seconds spectral signatures that various multivariate analysis techniques that relate can be used as fingerprints of the food products several analytical variables to the properties of (dairy products, fishes, edible oils, wines, etc.). the analyte(s). The multivariate techniques most The application of fluorescence in food analysis frequently used allow to group the samples with has increased during the last decade, probably similar characteristics, to establish classification due to the propagated use of chemometrics. The methods for unknown samples (qualitative analysis) study by Norgaard (1995) can serve as a general or to perform methods determining some proper- investigation of how to enhance the potential of ties of unknown samples (quantitative analysis). -
High Moisture Accelerated Mechanical Behavior Degradation of Phosphor/Silicone Composites Used in White Light-Emitting Diodes
Article High Moisture Accelerated Mechanical Behavior Degradation of Phosphor/Silicone Composites Used in White Light-Emitting Diodes Jiajie Fan 1,2,3,*, Zhen Wang 1,2, Xunwei Zhang 1, Zhentao Deng 4, Xuejun Fan 5 and Guoqi Zhang 3 1 College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China 2 State Key Lab of Solid State Lighting, Changzhou Institute of Technology Research for Solid State Lighting, Changzhou 213164, China 3 Department of Microelectronics, EEMCS Faculty, Delft University of Technology, 2628 Delft, The Netherlands 4 College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518061, China 5 Department of Mechanical Engineering, Lamar University, Beaumont, TX 77710, USA * Correspondence: [email protected] Received: 12 June 2019; Accepted: 21 July 2019; Published: 31 July 2019 Abstract: In a high-power white light emitting diode (LED) package, the phosphor/silicone composite is typically used for photometric and colorimetric conversions, ultimately producing the white light. However, the phosphor/silicone composite is always exposed under harsh environments with high temperature, high blue light irradiation and high moisture when the LED operates. Therefore, its reliability issue has become one of the critical bottlenecks to improve the lifetime of a high-power white LED package. As the curing process and mechanical behavior of phosphor/silicone composite essentially determine its reliability, this paper firstly uses an in situ viscosity monitoring approach combined with Differential Scanning Calorimetry (DSC) and Fourier Transform Infrared Spectroscopy (FTIR) analysis to explain the curing mechanism of a phosphor/silicone composite by taking the effects of temperature and phosphor mass fraction into consideration. -
Comparison of Life-Cycle Analyses of Compact Fluorescent and Incandescent Lamps Based on Rated Life of Compact Fluorescent Lamp
Comparison of Life-Cycle Analyses of Compact Fluorescent and Incandescent Lamps Based on Rated Life of Compact Fluorescent Lamp Laurie Ramroth Rocky Mountain Institute February 2008 Image: Compact Fluorescent Lamp. From Mark Stozier on istockphoto. Abstract This paper addresses the debate over compact fluorescent lamps (CFLs) and incandescents through life-cycle analyses (LCA) conducted in the SimaPro1 life-cycle analysis program. It compares the environmental impacts of providing a given amount of light (approximately 1,600 lumens) from incandescents and CFLs for 10,000 hours. Special attention has been paid to recently raised concerns regarding CFLs—specifically that their complex manufacturing process uses so much energy that it outweighs the benefits of using CFLs, that turning CFLs on and off frequently eliminates their energy-efficiency benefits, and that they contain a large amount of mercury. The research shows that the efficiency benefits compensate for the added complexity in manufacturing, that while rapid on-off cycling of the lamp does reduce the environmental (and payback) benefits of CFLs they remain a net “win,” and that the mercury emitted over a CFL’s life—by power plants to power the CFL and by leakage on disposal—is still less than the mercury that can be attributed to powering the incandescent. RMI: Life Cycle of CFL and Incandescent 2 Heading Page Introduction................................................................................................................... 5 Background................................................................................................................... -
Fluorescent Light-Emitting Diode (LED) Microscopy for Diagnosis of Tuberculosis
Fluorescent light-emitting diode (LED) microscopy for diagnosis of tuberculosis —Policy statement— March 2010 Contents Abbreviations Executive summary 1. Background 2. Evidence for policy formulation 2.1 Synthesis of evidence 2.2 Management of declarations of interest 3. Summary of results 4. Policy recommendations 5. Intended audience References Abbreviations CI confidence interval GRADE grades of recommendation assessment, development and evaluation LED light-emitting diode STAG-TB Strategic and Technical Advisory Group for Tuberculosis TB tuberculosis WHO World Health Organization Executive summary Conventional light microscopy of Ziehl-Neelsen-stained smears prepared directly from sputum specimens is the most widely available test for diagnosis of tuberculosis (TB) in resource-limited settings. Ziehl-Neelsen microscopy is highly specific, but its sensitivity is variable (20–80%) and is significantly reduced in patients with extrapulmonary TB and in HIV-infected TB patients. Conventional fluorescence microscopy is more sensitive than Ziehl-Neelsen and takes less time, but its use has been limited by the high cost of mercury vapour light sources, the need for regular maintenance and the requirement for a dark room. Light-emitting diodes (LED) have been developed to offer the benefits of fluorescence microscopy without the associated costs. In 2009, the evidence for the efficacy of LED microscopy was assessed by the World Health Organization (WHO), on the basis of standards appropriate for evaluating both the accuracy and the effect of new TB diagnostics on patients and public health. The results showed that the accuracy of LED microscopy was equivalent to that of international reference standards, it was more sensitive than conventional Ziehl-Neelsen microscopy and it had qualitative, operational and cost advantages over both conventional fluorescence and Ziehl- Neelsen microscopy. -
Introduction 1
1 1 Introduction . ex arte calcinati, et illuminato aeri [ . properly calcinated, and illuminated seu solis radiis, seu fl ammae either by sunlight or fl ames, they conceive fulgoribus expositi, lucem inde sine light from themselves without heat; . ] calore concipiunt in sese; . Licetus, 1640 (about the Bologna stone) 1.1 What Is Luminescence? The word luminescence, which comes from the Latin (lumen = light) was fi rst introduced as luminescenz by the physicist and science historian Eilhardt Wiede- mann in 1888, to describe “ all those phenomena of light which are not solely conditioned by the rise in temperature,” as opposed to incandescence. Lumines- cence is often considered as cold light whereas incandescence is hot light. Luminescence is more precisely defi ned as follows: spontaneous emission of radia- tion from an electronically excited species or from a vibrationally excited species not in thermal equilibrium with its environment. 1) The various types of lumines- cence are classifi ed according to the mode of excitation (see Table 1.1 ). Luminescent compounds can be of very different kinds: • Organic compounds : aromatic hydrocarbons (naphthalene, anthracene, phenan- threne, pyrene, perylene, porphyrins, phtalocyanins, etc.) and derivatives, dyes (fl uorescein, rhodamines, coumarins, oxazines), polyenes, diphenylpolyenes, some amino acids (tryptophan, tyrosine, phenylalanine), etc. + 3 + 3 + • Inorganic compounds : uranyl ion (UO 2 ), lanthanide ions (e.g., Eu , Tb ), doped glasses (e.g., with Nd, Mn, Ce, Sn, Cu, Ag), crystals (ZnS, CdS, ZnSe, CdSe, 3 + GaS, GaP, Al 2 O3 /Cr (ruby)), semiconductor nanocrystals (e.g., CdSe), metal clusters, carbon nanotubes and some fullerenes, etc. 1) Braslavsky , S. et al . ( 2007 ) Glossary of terms used in photochemistry , Pure Appl. -
Phosphor-Free Ingan White Light Emitting Diodes Using Flip-Chip Technology
Article Phosphor-Free InGaN White Light Emitting Diodes Using Flip-Chip Technology Ying-Chang Li 1, Liann-Be Chang 1,2,3,*, Hou-Jen Chen 1, Chia-Yi Yen 1, Ke-Wei Pan 1, Bohr-Ran Huang 4, Wen-Yu Kuo 4, Lee Chow 5, Dan Zhou 6 and Ewa Popko 7 1 Graduate Institute of Electro-Optical Engineering, Chang Gung University, Taoyuan 333, Taiwan; [email protected] (Y.-C.L.); [email protected] (H.-J.C.); [email protected] (C.-Y.Y.); [email protected] (K.-W.P.) 2 Department of Otolaryngology-Head and Neck Surgery, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan 3 Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 243, Taiwan 4 Graduate Institute of Electro-Optical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; [email protected] (B.-R.H.); [email protected] (W.-Y.K.) 5 Department of Physics, University of Central Florida, Orlando, FL 32816, USA; [email protected] 6 Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA; [email protected] 7 Institute of Physics, Wroclaw University of Technology, 50-370 Wroclaw, Poland; [email protected] * Correspondence: [email protected]; Tel.: +886-3-211-8800 Academic Editor: Durga Misra Received: 9 February 2017; Accepted: 17 April 2017; Published: 20 April 2017 Abstract: Monolithic phosphor-free two-color gallium nitride (GaN)-based white light emitting diodes (LED) have the potential to replace current phosphor-based GaN white LEDs due to their low cost and long life cycle. -
Fluorescent Lighting About the Guide
RESPONSIBLE PURCHASING GUIDE fluorescent lighting About the Guide The Responsible Purchasing Guide for Lighting is published by the Responsible Purchasing Network in print, as a PDF file, and on the web. Print and PDF copies are available to the public for purchase. The online edi- tion includes additional resources available to members of the Responsible Purchasing Network, including: searchable product listings, multiple policy and specification samples, comparisons of standards, and related documents. Visit www.ResponsiblePurchasing.org to purchase a copy or to access the members-only web- based edition of the Guide. Responsible Purchasing Network © 2007 About the Responsible Purchasing Network The Responsible Purchasing Network (RPN) was founded in 2005 as the first national network of procurement-related professionals dedicated to socially and environmentally responsible purchasing. RPN is a program of the Center for a New American Dream (www.newdream.org) and guided by a volunteer Steering Committee of leading procurement stakeholders from government, industry, educational institutions, standards setting organizations, and non-profit advocacy organizations. Acknowledgements The Responsible Purchasing Network (RPN) would like to thank the following people for assisting with the development of this Guide. Their expertise helped to ensure quality and accuracy, though RPN alone accepts responsibility for any errors or omissions. Affiliations listed below were current when input was provided to RPN and are listed for identification purposes -
Skylighter™ Brand Fluorescent Strobe Lighting
Skylighter™ Brand Fluorescent Strobe Lighting Operator’s Manual Skylighter CFF2 Skylighter CFF4 Skylighter CFF8 OPERATOR MANUAL FOR SKYLIGHTER Skylighter CFF2 Skylighter CFF4 Skylighter CFF8 Thank you for selecting the Photogenic Professional Skylighter CFF series. The CFF series incorporates the newest electronic components, lamps, reflectors, and diffusion panels providing improved lighting distribution and control. These products are built for the demanding operational needs of the professional photographer and it is our expectation that your Skylighter CFF will provide you with years of dependable service. INTRODUCTION The Skylighter CFF series are an extremely diffused light head and require an external power supply. They have one, two, or four professional, plug-in, linear flashtubes, and one, two, or four non-adjustable, linear, fluorescent modeling lamps. The Skylighter CFF series are stand mounted on a strong, rotating yoke, but may be ceiling hung, as required. Before using your new Skylighter CFF for the first time, please read this manual carefully and acquaint yourself with the controls and features. In this way, you can quickly get the greatest benefit from your new unit and maintain an efficient and safe operation. SAFETY PRECAUTIONS Despite the measures that have been taken to make electronic flash equipment safe, it must be recognized that high voltages and high temperatures do exist within the power supply / lighting unit. Certain precautions must be observed in handling the unit. Contact with internal high voltage may result in severe injury or death. 1. Before installing or removing the flashtubes and modeling lamps, be sure this appliance is turned off, cooled and unplugged from AC power source and external power supply. -
Fluorescent Lamp
FLUORESCENT LAMP SELECTION GUIDE FEBRUARY 2015 Keystone presents the easiest solution for high performance, high efficiency lamps. With long life and exceptional reliability, Keystone energy efficient lamps provide the same high quality you have come to expect from Keystone. When installing Keystone lamps and ballasts together, you experience the industry’s best warranty program and a lighting system that is guaranteed to perform. FEATURES AND BENEFITS • High Color Rendering Index • Lumen Maintenance of Up to 94% • Eco-Friendly and TCLP Compliant • Energy Efficient • Long Life: Up to 36,000 Hours • Reduced Maintenance and Disposal Costs KEYSTONE FLUORESCENT SYSTEM WARRANTY Keystone Standard Lamp Warranty Period Keystone Fluorescent System Warranty Period 24 months 36 months (Lamp Portion) We proudly stand behind all of our products. By pairing a Keystone lamp with a Keystone ballast, customers are eligible for a 36-month Keystone Fluorescent System Warranty. The Keystone Fluorescent System Warranty extends the standard 24-month warranty included with our lamps by an additional 12 months. In the event that you need to utilize our warranty, we’ll work with you to make it easy and hassle-free. Visit www.keystonelamp.com for more details. LIGHTING COLOR GUIDE Warm Light Neutral Light Cool Light Warm White Color, Warm Tones Neutral to Bright White Color, Neutral or Cooler Tones Cool White Color, Cooler Daylight Tones 2600K 3500K 4100K 5000K 6500K ELECTRICAL SPECIFICATIONS T5 Linear Rated Average Life3 Nominal Base Nominal Case Color Temp. Initial -
!History of Lightingv2.Qxd
CONTENTS Introduction 3 The role of lighting in modern society 3 1. The oldest light sources 4 Before the advent of the lamp 4 The oldest lamps 4 Candles and torches 5 Further development of the oil lamp 6 2. Gaslight 9 Introduction 9 Early history 9 Gas production 10 Gaslight burners 10 The gas mantle 11 3. Electric lighting before the incandescent lamp 14 Introduction 14 Principle of the arc lamp 15 Further development of the arc lamp 16 Applications of the arc lamp 17 4. The incandescent lamp 20 The forerunners 20 The birth of the carbon-filament lamp 22 Further development of the carbon-filament lamp 25 Early metal-filament lamps 27 The Nernst lamp 28 The birth of the tungsten-filament lamp 29 Drawn tungsten filaments 30 Coiled filaments 30 The halogen incandescent lamp 31 5. Discharge lamps 32 Introduction 32 The beginning 32 High-voltage lamps 33 Early low-pressure mercury lamps 34 The fluorescent lamp 35 High-pressure mercury lamps 36 Sodium lamps 37 The xenon lamp 38 6. Electricity production and distribution 39 Introduction 39 Influence machines and batteries 39 Magneto-electric generators 40 Self-exciting generators 41 The oldest public electricity supply systems 41 The battle of systems 42 The advent of modern a.c. networks 43 The History of Light and Lighting While the lighting industry is generally recognized as being born in 1879 with the introduction of Thomas Alva Edison’s incandescent light bulb, the real story of light begins thousands of years earlier. This brochure was developed to provide an extensive look at one of the most important inventions in mankind’s history: artificial lighting. -
Compact Fluorescent Lamps
Office of Compliance fast facts advancing safety, health, and workplace rights in the legislative branch January 2009 Compact Fluorescent Lamps Environmental issues are a top priority for many Fluorescent lamps contain a organizations. These days, it's hard to watch TV small amount of mercury vapor without hearing how businesses and institutions can - approximately 5 milligrams - help the environment by "going green." One sealed within the glass tubing. increasingly popular way of contributing to the Mercury, at atmospheric pres- green movement is to install compact fluorescent sure, is a silver colored liquid lamps (CFLs), a fluorescent bulb designed to emit that tends to form balls. Mercury as much light as traditional light bulbs while using is a hazardous substance that can less energy. CFLs use about 75 percent less energy be inhaled, absorbed through the Figure 2:Burnt out CFL than standard incandescent bulbs and can last up to skin, and ingested. It is a neurotoxin that can cause - 10 times longer. CFLs also produce about 75 among many additional symptoms - tremors, insom- percent less heat, so they're safer to operate and can nia, lassitude, weight-loss, and emotional distur- cut building cooling bances. Because CFLs contain a small amount of costs. mercury, they should be recycled rather than thrown out in the trash. Fluorescent light bulbs (including compact Mercury is a critical component of CFLs and is the fluorescents) are more substance that allows the lamp to turn on. No mer- energy-efficient than cury is released when the lamps are intact or in use, regular bulbs because and if the lamp is disposed of properly, mercury in Figure 1: Compact Fluorescent Lamp of the different method CFLs shouldn't be an environmental, safety, or they use to produce health hazard.