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(Click for frequent words.) 70 multicrystalline silicon 70 multicrystalline 69 UMG silicon 69 polysilicon wafers 68 solar PV module 68 crystalline modules 67 Crystalline silicon 67 monocrystalline cells 67 polycrystalline solar 67 UMG Si 67 poly silicon 67 CIS CIGS 67 crystalline Si 67 crystalline silicon photovoltaic 67 crystalline silicon c 66 CIGS panels 66 crystalline silicon solar panels 66 CdTe PV 66 silicon PV modules 66 monocrystalline wafers 66 photovoltaic module 66 Copper Indium Gallium Selenide 65 monocrystalline silicon 65 solar PV modules 65 multicrystalline wafers 65 c Si 65 solar photovoltaic modules 65 purity silicon 65 crystalline silicon wafers 65 CIGSolar 64 solar photovoltaic PV modules 64 multicrystalline solar cells 64 lowest levelized 64 copper indium gallium diselenide 64 multi crystalline silicon 64 solar photovoltaic cells 63 photovoltaic PV modules 63 poly Si 63 PV module 63 poly crystalline 63 PV inverters 63 multicrystalline solar 63 CIGS PV 63 cadmium telluride thin 63 amorphous silicon Si 63 CIGS copper indium 63 multicrystalline wafer 63 photovoltaic PV module 63 CIGS cells 62 silicon feedstock 62 monocrystalline polycrystalline 62 CIGS modules 62 crystalline silicon panels 62 crystalline silicon 62 crystalline PV 62 photo voltaic PV 62 Microinverters 62 PV module manufacturers 62 CIGS solar 62 concentrated photovoltaic CPV 62 Micromorph 62 germanium substrates 62 ENN Solar 62 Cadmium Telluride CdTe 62 monocrystalline solar 62 multicrystalline silicon cells 62 #Wp 62 CIGS module 61 SUNERGY inverters 61 multicrystalline silicon wafers 61 Monocrystalline 61 Amorphous silicon 61 mono crystalline silicon 61 Sanyo HIT 61 crystalline silicon PV 61 levelized cost 61 CIGSe 61 Polycrystalline silicon 61 CdTe thin film 61 PowerTilt 61 SOFC stacks 61 cadmium telluride CdTe 61 Gallium Arsenide GaAs 61 mono crystalline 61 CIGS solar cell 61 SiC wafers 61 CdTe Si 61 multicrystalline cells 61 multijunction solar cells 60 solar laminates 60 micromorph 60 solar cells 60 polycrystalline silicon poly Si 60 backsheet component 60 superconductor wire 60 bioplastic packaging 60 silicon ingots 60 concentrator photovoltaic 60 #.#/watt 60 copper indium gallium selenide 60 Photovoltaic modules 60 Copper Indium Gallium diSelenide 60 monocrystalline ingots 60 polysilicon wafer 60 Suntech solar panels 60 solar wafers 60 Photovoltaic PV 60 Silicon Carbide SiC 60 W/cm2 60 String Ribbon 60 CIGS Copper Indium 60 Solamet ® 60 micromorph ® 60 PV module manufacturing 60 mono crystalline solar 60 Cadmium telluride 60 TFPV 60 CIGS solar cells 60 BIPV BAPV 60 copper indium gallium 60 Cadmium Telluride 60 silicon photovoltaic modules 60 solar modules 59 CIGS photovoltaic PV 59 CdTe 59 MBPV 59 AlGaAs 59 Solar Wafers 59 SUNERGY inverter 59 epitaxial wafers 59 Thin Film Line 59 Soitec produces 59 PV modules 59 GaN wafer 59 Solibro 59 terrestrial concentrator 59 polysilicon feedstock 59 polycrystalline photovoltaic 59 amorphous silicon solar panels 59 Polyol 59 Copper Indium Gallium 59 monocrystalline silicon wafers 59 solar PVs 59 Polycrystalline 59 CPV solar 59 solar pv 59 epiwafers 59 Moser Baer Photovoltaic 59 SOI wafers 59 Micromorph ® 59 Elpida #nm 59 Si substrates 59 Avancis 59 photovoltaic modules 59 CIGS solar panels 59 ownership CoO 58 PV inverter 58 photovoltaic PV 58 oxide semiconductor 58 Applied SunFab 58 viscose fibers 58 photovoltaic 58 Maxwell BOOSTCAP 58 cadmium telluride panels 58 crystalline photovoltaic 58 DSSCs 58 FeSi 58 silicon photovoltaics 58 crystalline PV modules 58 Gallium Arsenide 58 cadmium telluride 58 PARALEX 58 Auria Solar 58 crystalline solar panels 58 BioOil ® 58 polypropylene compounds 58 BIPV solar 58 sapphire substrate 58 silicon 58 inverter air conditioners 58 Solar Modules 58 amorphous silicon PV 58 AMOLEDs 58 wafer thickness 58 BOPP films 58 Optima XE 58 SkyTrough 58 CIGS solar modules 58 String Ribbon solar 58 ferro manganese 58 Powerful debug 58 GaN wafers 58 Applied Materials SunFab 58 silicon photovoltaic PV 58 NexPower 58 amorphous silicon solar 58 BioBacksheet TM 58 SoloPower flexible 58 film transistors TFTs 58 epitaxial wafer 58 di selenide 58 SiC substrates 57 Concentrating solar 57 Tedlar films 57 PV Modules 57 micro inverter 57 Ge substrates 57 indium gallium phosphide 57 antireflective coatings 57 Topsoe 57 2MW wind turbines 57 HBLED 57 micro inverters 57 polycrystalline 57 nitride semiconductor 57 Photowatt France 57 #MWh 57 aleo modules 57 GaN HEMTs 57 vanadium redox batteries 57 cadmium telluride CdTe thin 57 ferro silicon 57 monolithically integrated 57 photovoltaics PV 57 microinverters 57 hydrogen purifiers 57 BGA packaging 57 amorphous Si 57 Uhde Inventa Fischer 57 PA6 57 photovoltaic backsheets 57 2G HTS wire 57 GaAs substrates 57 multicrystalline silicon solar 57 Yangguang Solar 57 centrotherm 57 CIGS photovoltaic 57 varistor 57 UNI SOLAR R 57 GaN LED 57 monocrystalline silicon solar 57 catalytic oxidation 57 Biomass gasification 57 Uni Solar 57 Astronergy 57 3kW 57 crystalline silicon module 57 monocrystalline modules 57 CIGS thin film 57 Adipic acid 57 CdTe solar 57 feedstock propylene 57 performance solar encapsulants 57 crystalline solar 57 photovoltaic PV solar panels 57 modified sine wave 57 Uni Solar Ovonic 57 gallium selenide 57 CMOS fabrication 57 MaxEdge 57 silane gas 57 solar concentrator systems 57 polycrystalline modules 57 cadmium sulphide 57 solar PV 57 graphite electrode 57 organic photovoltaic OPV 57 germanium substrate 57 selective emitter cells 57 solar photo voltaic 57 multicrystalline module 57 multi crystalline wafers 57 supercritical boiler 57 ZMDI 57 photovoltaic inverter 56 indium gallium nitride InGaN 56 GESOLAR 56 TEGs 56 microinverter 56 anode materials 56 #MWp [002] 56 concentrator photovoltaic CPV 56 ferro molybdenum 56 Energy LCOE 56 magnesium extruded 56 tantalum powder 56 laser diode modules 56 viscose filament 56 Solaron 56 li ion batteries 56 amorphous alloy transformers 56 thermoelectric generators 56 nickel hydroxide 56 Gallium Nitride GaN 56 silicon ingot 56 kW inverters 56 tantalum capacitors 56 thermoset composites 56 amorphous alloy 56 encapsulants 56 Micro Inverter 56 GaAs MESFET 56 copper indium gallium selenium 56 precipitated silica 56 PV panels 56 temperature polysilicon LTPS 56 Enable mPE 56 ThermaVolt ™ 56 Amorphous Silicon 56 SolFocus CPV 56 PV Inverters 56 PEMFCs 56 tetrapod quantum dots 56 #VDC [002] 56 String Ribbon wafer 56 Wp 56 MOCVD systems 56 laser diode arrays 56 7MW 56 Lithium Ion Li Ion 56 BIPV modules 56 Multicrystalline 56 rooftop PV 56 monocrystalline 56 Solarworld AG SWV GY 56 aluminum electrolytic capacitors 56 LiNbO3 56 Systaic 56 SunFab 56 CEEG 56 Calyxo 56 polymeric membranes 56 CIGSolar ™ 56 photo voltaics 56 Reliathon 56 conductive pastes 56 Centrosolar 56 tantalum capacitor 56 photo voltaic solar panels 56 aluminum electrolytic 56 reliability serviceability 56 capacitance values 56 nanopowders 56 multijunction 56 Tunable Loop 56 transparent conductive oxide 56 laterally diffused metal 56 upgraded metallurgical 56 IC substrate 56 GT Solar DSS 56 MLCC capacitors 56 virgin PET 56 #mm silicon wafers 56 nitrogenous fertilizer 56 Gallium arsenide 56 microcrystalline silicon 56 mm silicon wafers 56 amorphous silicon 56 Jiangsu Shunda 56 InGaN 56 Scheuten Solar 56 Honda Soltec 56 Motech Solar 56 solar concentrator 56 selective emitter 56 Polysilicon 56 First Solar FSLR.O 55 transparent conductive coatings 55 photoelectric conversion 55 ceramic membranes 55 levelised 55 leadframes 55 NiZn 55 solar PV inverter 55 high purity polysilicon 55 gallium arsenide cells 55 Compact Fluorescent Lamps CFLs 55 wirewound 55 thermoplastic materials 55 Rs #,#-#,# tonne 55 Succinic Acid 55 backsheet 55 SUNERGY 55 High Concentration Photovoltaic 55 chip resistors 55 photo voltaic 55 recycled LDPE 55 AmpleSun 55 voltage inverter 55 injection molded parts 55 metallic nanopowders 55 polycrystalline silicon 55 hyperpure polycrystalline silicon 55 acrylic monomers 55 silicon substrates 55 #.# micron node 55 MicroCSP 55 polypropylene resin 55 inge AG 55 Vanadium Redox Battery 55 6kW 55 OptoCooler 55 TFT LCD module 55 ElectroPhen 55 VFY 55 backsheet materials 55 Grätzel cells 55 Silicon wafers 55 PARALEX TM 55 ingots wafers cells 55 SkyTrough ® 55 mono ethylene glycol MEG 55 calcined kaolin 55 Moser Baer Photo Voltaic 55 CNT FED 55 extrusion ingots 55 Silane 55 Chromasun 55 supercritical boilers 55 Silicon carbide 55 Lithium Iron Phosphate 55 Schottky rectifiers 55 insulator SOI technology 55 Italy Novamont SPA 55 LED printheads 55 photovoltaic PV panels 55 Thalheim Germany 55 hetero junction 55 solar photovoltaics PV 55 hafnium oxide 55 foundry alloys 55 concentrating photovoltaics 55 multicrystalline ingots 55 solar photovoltaics 55 CMOS silicon 55 stated Xiaofeng Peng 55 Gallium Nitride 55 1kW 55 Plug Power GenDrive 55 wafer ASPs 55 thermosetting resins 55 Solar Inverters 55 HyperSolar concentrator 55 ceramic crucibles 55 austenitic grades 55 efficiency mono crystalline 55 flexible monolithically integrated 55 Enphase 55 di selenide CIGS 55 Aixtron MOCVD 55 carbon nanotube CNT 55 Enecsys micro inverter 55 SOFCs 55 GaN LEDs 55 MDI methylene diphenyl diisocyanate 55 crystalline silicon photovoltaic PV 55 polysilicon 55 flexible OLEDs 55 #nm silicon 55 photovoltaic wafers 55 CaliSolar 55 sapphire wafers 55 WaterSavr 55 #kW wind turbines 55 Solar Module 55 indium nitride 55 concentrating photovoltaic 55 photovoltaic PV solar 55 SiMn 55 FCgen TM -# 55 III nitride 55 #mb PowerBook G4 55 Andalay panels 55 clad laminates 55 metallization firing 55 polycarbonate resins 55 UHB LEDs 55 APET sheet 55 metallurgical silicon 55 Novelis Fusion 55 ion batteries 55 MiaSole 55 aeroderivative 55 acrylic esters 55 QFN packaging 55 #MW #MW [001] 55 HCPV 55 deep ultraviolet DUV 55 Sponge iron 55 soy protein isolates 55 cells Covered Interconnect 55 DFC# [003] 55 8kW 55 BJTs 55 kilowatt kW 55 bagasse cogeneration 55 rigid polyurethane foam 55 rice husk ash 55 backlight module 55 photovoltaics 55 CMOS photonics 55 String Ribbon ® 55 photovoltaic solar panels 55 quantum dot solar 55 LED BLUs 55 Lextar 54 Lithium Niobate 54 trichlorosilane TCS 54 integrated microinverter 54 PV# [002] 54 CIGS 54 VICTREX PEEK 54 silicon Si 54 Andalay AC panels 54 ac dc power 54 circulator pumps 54 UHMW PE 54 CMP consumables 54 ZnSe 54 photovoltaics PVs 54 PowerGate TM 54 polycrystalline silicon solar 54 Palcan 54 Conergy AG CGY GY 54 AIX #G# 54 extruded aluminum profiles 54 tensile modulus 54 nanoparticle inks 54 dye sensitized 54 hydro electric generators 54 CS6P 54 Photovoltaic PV solar 54 solar PV inverters 54 polyurethane PU 54 BlueGen 54 thermopower 54 Levelized Cost 54 SAC# 54 Solamet 54 Silicon Feedstock 54 reinforced plastics 54 Photovoltaics PV 54 kWe 54 BLUs 54 MLCCs 54 polyethylene PE 54 epi wafers 54 PET resins 54 BOOSTCAP ultracapacitor 54 liquid argon 54 ceramic capacitors 54 SunFab ™ 54 silicon carbide substrates 54 Synthetic rubber 54 solar photovoltaic 54 7GW 54 electro optic modulators 54 supercritical steam 54 elastomeric seals 54 nanostructured silicon 54 EcoDuo PM#P# 54 InGaP HBT 54 PolyMax 54 MESFET 54 photovoltaic laminates 54 galvannealed 54 Chip Resistors 54 HEMTs 54 IC foundry 54 SOI CMOS 54 polymer capacitors 54 CyberDisplay #K 54 EverQ joint venture 54 PET polymers 54 #V MOSFETs [002] 54 Evergreen Solar panels 54 polyethylene resins 54 embedded ac dc 54 fatty alcohols 54 HCPV panels 54 concentrator photovoltaics 54 bleached eucalyptus pulp 54 MOCVD tool 54 Solar Inverter 54 environmentally friendly refrigerants 54 cathode materials 54 #/kW 54 lanthanum oxide 54 LED emitter 54 E'Jenie 54 #.#MW wind turbines 54 photovoltaic inverters 54 monosilane 54 photo voltaic solar 54 activated carbons 54 engineered substrates 54 dielectric strength 54 copper indium diselenide 54 tellurium selenium iridium 54 amorphous silicon thin 54 microbolometers 54 photovoltaic roofing 54 cordierite 54 efficiency Gallium Arsenide 54 HTS wire 54 phototransistors 54 junction amorphous silicon 54 SOI MEMS 54 chipscale 54 layer ceramic capacitor 54 eSolar modular 54 decorative laminate 54 planar magnetics 54 superconducting wire 54 Wh kg 54 zinc oxide ZnO 54 thermoplastic resin 54 Ferro chrome 54 amorphous alloy cores 54 magnetron sputtering 54 polypropylene resins 54 refined glycerin 54 voltage CMOS 54 mass producible hydrogen 54 2GW 54 organic photovoltaics 54 #W halogen 54 thermal conduction 54 XLR #i 54 Nano Tube 54 lithium ion rechargeable batteries 54 graphite electrodes 54 ferritic 54 HomePowerPlant 54 hermetic packaging 54 DSS furnaces 54 metallocene 54 polyamides 54 CCFL LCD 54 planar lightwave circuits 54 CAPEX OPEX 54 Follow Vishay 54 silicon germanium SiGe 54 Unisolar 54 voltage switchgears 54 piezoelectric ceramics 54 #Mw [003] 54 k gate dielectric 54 transparent electrode 54 vertically integrated PV 54 TFT backplanes 54 n butanol 54 reformed methanol 54 CMOS transistors 54 GaAs substrate 54 efficiency monocrystalline silicon 54 Lithium Ion Polymer 54 HTS wires 54 amorphous silicon TFT 54 granular polysilicon 54 kW inverter 54 wafer diameters 54 Nanosolar Utility Panel 54 graphite anode 54 #nm wafers 54 #lm W [002] 54 lithium chemistries 53 LCOE 53 epitaxial structures 53 TFPV solar module 53 Q Cells SE QCE 53 HDI PCB 53 photovoltaic solar 53 bicomponent 53 PIN diodes 53 photovoltaic PV laminates 53 amplifier modules 53 Photovoltaic Module 53 SO8 53 Thin Film Solar 53 hydrocarbon feedstock 53 #.#uF 53 nano composites 53 ferrochromium 53 FeMn 53 millimeter silicon wafers 53 lithium rechargeable batteries 53 String Ribbon wafers 53 linear Fresnel 53 LTPS TFT LCD 53 ThyssenKrupp VDM 53 projected capacitive touch 53 spandex fibers 53 viscose staple fiber 53 light emitting diodes LED 53 BioBacksheet 53 CCFLs 53 BOPP film 53 polycrystalline PV 53 Fluff pulp 53 multilayer ceramic capacitors MLCC 53 electro optic plastics 53 Satcon PowerGate Plus 53 Thin Film Transistors 53 UNI SOLAR 53 meter rotor diameter 53 transparent conductive electrodes 53 molten carbonate fuel 53 RF MEMS switches 53 spodumene concentrate 53 LDO regulators 53 SO8 package 53 voltage MOSFET 53 low VOC emitting 53 Sunfilm 53 ElectroChem 53 Hanwha SolarOne 53 SMA inverters 53 Opcon Powerbox 53 ferro niobium 53 Lithium ions 53 dissolving pulp 53 axis trackers 53 NiMH nickel 53 fully dimmable 53 renewably sourced materials 53 #.#MW wind turbine 53 polylactide 53 aluminum foils 53 Solaron inverters 53 andmanufacturing 53 gigawatt GW 53 Polypropylene PP 53 PV laminates 53 k gate dielectrics 53 OTCBB SOPW 53 Si PV 53 BIPV roofing 53 Solaron inverter 53 SiC Schottky diodes 53 passive matrix OLEDs 53 RF LDMOS 53 voltage HV 53 solar inverter 53 threshold voltages 53 Alanod Solar 53 organic TFTs 53 LED streetlight 53 solar concentrators 53 SMD LEDs 53 Saflex interlayers 53 Tedlar R 53 SIMOX 53 borohydride 53 Veeco MOCVD Operations 53 Manz Automation 53 ceramic capacitor 53 RWE SCHOTT Solar 53 Si TFT LCD 53 Bitterfeld Wolfen 53 polyolefin resins 53 Aide Solar 53 asola 53 thermal conductivities 53 inertial MEMS 53 encapsulant 53 Supercapacitors 53 Hoku Membrane 53 Tedlar ® 53 C0G 53 BCTMP 53 backsheets 53 cored wire 53 Schuco Solar 53 String Ribbon ™ 53 silicone encapsulation 53 Indosolar 53 silico manganese 53 gallium arsenide indium phosphide 53 CCFL backlights 53 Maximizer Solution 53 crystalline silicon wafer 53 #MWs 53 Frankfurt A3T 53 power optimizers 53 CCGTs 53 galv 53 T5 lamps 53 efficient Quantum Dot 53 TOPSwitch JX 53 BioBacksheet ™ 53 Li ion battery charger 53 Esatto Technology 53 Microturbine 53 ERW pipe 53 AMLCD 53 electrocatalysts 53 magnesium hydride 53 ferrovanadium 53 CNano 53 levelised cost 53 metallization pastes 53 PHEMT 53 synchronous buck regulators 53 1GW 53 Ultracapacitor 53 UL #V 0 53 single axis trackers 53 filament yarn 53 CIGS photovoltaics 53 Saflex interlayer 53 TFTs 53 piezoceramic 53 Optisolar 53 nanometal 53 LUXEON H 53 SOI wafer 53 Renewable energies 53 electrolyzers 53 SUNERGY II 53 Nasdaq SPWRA 53 GaAs solar 53 IC substrates 53 homopolymers 53 Thin Film Solar Modules 53 rectifier diode 53 String Ribbon solar panels 53 motherglass 53 SiC MOSFETs 53 thermoplastic elastomers 53 superconducting cables 53 multilayer ceramic capacitors 53 biaxially oriented polypropylene 53 ReRAM 53 QSolar 53 cellulosic fibers 53 BIPV 53 polyolefin plastics 53 PowerGate Plus 53 PVB sheet 53 GaN transistor 53 Thin Film PV 53 DeWind D#.# 53 ISO# certification [001] 53 FuelCell Energy Direct FuelCell 53 Photovoltaic solar panels 53 Gintech 53 Li ion rechargeable batteries 53 junction gallium arsenide 53 Renewable Energy Certificate 53 DFB lasers 53 Solar Fabrik 53 Alucobond 53 lithium ion polymer 53 DSS#HP 53 crystalline silicon photovoltaic modules 53 asphalt emulsions 53 battery chemistries 53 UNI SOLAR ® 53 Gintech Energy 53 inch widescreen panels 53 Varian Semiconductor reliance 53 photovoltaic installations 53 prismatic cells 53 silicon photonic 53 inorganic LEDs 53 aluminum nitride 53 #nm CMOS [002] 53 PV photovoltaic 53 epiwafer 53 K dielectrics 52 thermoplastic resins 52 engineering thermoplastics 52 germanium wafers 52 silicon oxynitride 52 Smartcool ESM TM 52 CCL Tube 52 Ferrosilicon 52 rigid substrate 52 zinc bromide 52 AlGaInP 52 Amperes 52 Coriolis meters 52 ElectriPlast ¿ 52 e3 Supercell 52 Victrex PEEK 52 Silicon CMOS Photonics 52 cuprous oxide 52 nanocrystalline cellulose 52 GWp 52 hopper railcar 52 DirectFET 52 cellulose ethers 52 THINERGY MECs 52 Zener diodes 52 SunShot 52 hydride vapor phase 52 REpower wind turbines 52 ethylene amines 52 quartz oscillators 52 PV module efficiencies 52 phenol acetone 52 piezoelectric ceramic 52 nm CMOS process 52 encapsulant sheets 52 selenium CIGS 52 metallurgical coals 52 Solar Photovoltaic PV 52 TerniEnergia 52 MiaSolé 52 cellulostic 52 IGBT Insulated Gate 52 Titanate 52 multilayer PCBs 52 polyisocyanurate insulation 52 3MW turbines 52 carbon steels 52 1KW 52 LiFePO4 52 nanoclay 52 Gallium nitride 52 ingot wafer 52 Direct FuelCell DFC 52 recycled containerboard 52 Astrodyne 52 magnesium ingot 52 decontrolled fertilizers 52 etch selectivity 52 thermoelectric coolers 52 Xantrex inverters 52 output capacitors 52 transparent conductive films 52 epitaxial silicon 52 CPV modules 52 Thermoelectric materials 52 PEM fuel 52 Mono Ethylene Glycol MEG 52 capacitive touch panels 52 Solarworld AG 52 vanadium redox battery 52 multijunction cells 52 GHG abatement 52 denim fabrics 52 LDK polysilicon 52 XinAo Group 52 inherently flame retardant 52 PVD coating 52 modules inverters 52 monocrystalline ingot 52 Dektak 52 TPUs 52 electro galvanized 52 Sulfurcell 52 photovoltaic cells 52 #nm CMOS [001] 52 synthetic soda ash 52 lyocell 52 Photovoltaic Modules 52 NanoBridge 52 LSE CPX 52 lithium carbonate Li#CO# 52 die castings 52 nm CMOS 52 distributed MPPT 52 bleached pulp 52 LETG 52 phosphatic fertilizer 52 Concentrated solar 52 Gildas Sorin CEO 52 Solaria modules 52 crystalline silicon solar 52 Signet Solar 52 carbon ferromanganese 52 TGA# SM 52 4 x 4mm 52 GaAs pHEMT 52 thermoplastic elastomers TPEs 52 brightness LED 52 BAPV 52 Fluorescent lamps 52 styrene butadiene rubber 52 #Mbit DDR2 52 #.#kW [004] 52 synchronous motors 52 modified starch 52 density polyethylene HDPE pipe 52 CdSe 52 Mirel bioplastic 52 PVB interlayers 52 optical modulators 52 5mm x 6mm 52 AMSC PowerModule 52 electroluminescence EL 52 transistor LCDs 52 Low density polyethylene 52 stainless steel housings 52 conductivities 52 PV concentrator 52 CFL lamps