Patents-Review.com
ClassID:

205692 ⎘

H01J61/44 - CPC Classification

Classification description:

Gas-discharge or vapour-discharge lamps; Details; Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence Devices characterised by the luminescent material

Recent Application in this class:
#1
20250316471
2025-10-09

ULTRAVIOLET LIGHT EMITTING ELEMENT AND ULTRAVIOLET LIGHT IRRADIATION DEVICE PROVIDED WITH THE SAME

 #2
20230348783
2023-11-02

METHOD OF MANUFACTURING LIGHT EMITTER, LIGHT EMITTER AND ULTRAVIOLET LIGHT SOURCE

 #3
20220076940
2022-03-10

Phosphor for a UV emitting device and a UV generating device utilizing such a phosphor

 #4
20220076939
2022-03-10

VACUUM ULTRAVIOLET EXCIMER LAMP WITH AN INNER AXIALLY SYMMETRIC WIRE ELECTRODE

 #5
20220068626
2022-03-03

Excimer lamp and light irradiation device

 #6
20220025258
2022-01-27

UV-EMITTING PHOSPHOR, METHOD FOR PRODUCING SAME, AND UV EXCITATION LIGHT SOURCE

 #7
20200288642
2020-09-17

Horticulture lighting device

 #8
20190298879
2019-10-03

System for treating a fluid with non-mercury-based UV light

 #9
20190206670
2019-07-04

Burst-mode for low power operation of RF fluorescent lamps

 #10
20190172699
2019-06-06

Low-pressure discharge lamp

 #11
20190080897
2019-03-14

Phosphor-containing film and backlight unit

 #12
20180269022
2018-09-20

Extraction structure for a UV lamp

 #13
20180155619
2018-06-07

Method of producing thiogallate-based fluorescent material, method of producing light-emitting device, thiogallate-based fluorescent material and light-emitting device

 #14
20180138027
2018-05-17

Phosphor-containing film and backlight unit

 #15
20180066186
2018-03-08

Phosphors and phosphor-converted LEDs

 #16
20180037469
2018-02-08

Aluminate fluorescent material and light emitting device

 #17
20170076933
2017-03-16

Low-pressure discharge lamp with fluorescent particles having a small particle size

 #18
20170058085
2017-03-02

Curing process of ultraviolet curable paint

 #19
20160300705
2016-10-13

Ultraviolet light emitting device

 #20
20160300704
2016-10-13

Ultraviolet light emitting device that can suppress time-dependent decrease in emission intensity during continuous operation

 #21
20160079053
2016-03-17

Compositions and methods for modifying lumen maintenance characteristics of phosphor-containing coatings

 #22
20160071718
2016-03-10

Fluorescent lighting with aluminum nitride phosphors

 #23
20160064203
2016-03-03

Phosphor-containing coating systems and fluorescent lamps equipped therewith

 #24
20160053170
2016-02-25

Magnesium alumosilicate-based phosphor

 #25
20160042939
2016-02-11

Low pressure lamp using non-mercury materials

 #26
20150376496
2015-12-31

PHOSPHOR, DEEP ULTRAVIOLET LIGHT-EMITTING DEVICE AND PHOSPHOR PRODUCTION METHOD

 #27
20150364317
2015-12-17

Excimer lamp

 #28
20150354783
2015-12-10

Adjustment component and light-emitting device

 #29
20150179423
2015-06-25

Phosphor materials, fluorescent lamps provided therewith, and methods therefor

 #30
20150156833
2015-06-04

Lamp using solid state source

 #31
20150126756
2015-05-07

Production of propylene oxide

 #32
20150117013
2015-04-30

Light conversion assembly, a lamp and a luminaire

 #33
20150054399
2015-02-26

Coating systems and fluorescent lamps provided therewith

 #34
20150021423
2015-01-22

Alumina, luminophores and mixed compounds, and associated preparation processes

 #35
20140333203
2014-11-13

RED EMITTING PHOSPHOR FOR PLASMA DISPLAY PANELS AND GAS DISCHARGE LAMPS

 #36
20140306598
2014-10-16

Fluorescent lamp with high color rendering index and coating systems therefor

 #37
20140300271
2014-10-09

Lamp using solid state source

 #38
20140231857
2014-08-21

Phosphor materials and related devices

 #39
20140191652
2014-07-10

Illuminant and illuminant lamp comprising said illuminant

 #40
20140131619
2014-05-15

Luminescent material particles comprising a coating and lighting unit comprising such luminescent material

 #41
20140111082
2014-04-24

Fluorescent lamp including phosphor composition with special BAMn phosphor, (Ba,Sr,Ca)(Mg1-x Mnx)Al10O17:Eu2+

 #42
20140084779
2014-03-27

Recyclability of fluorescent lamp phosphors

 #43
20140048743
2014-02-20

Luminophores and core-shell luminophore precursors

 #44
20130234583
2013-09-12

High color rendering index fluorescent lamp with multi-layer phosphor coating

 #45
20130207538
2013-08-15

Phosphor, manufacture thereof; light-emitting device, and image display device utilizing phosphor

 #46
20130207535
2013-08-15

Phosphor, manufacture thereof, light-emitting device, and image display device

 #47
20130193835
2013-08-01

FLUORESCENT LAMP WITH COATED PHOSPHOR PARTICLES

 #48
20130140978
2013-06-06

Phosphor system for improved efficacy lighting sources

 #49
20130134863
2013-05-30

Phosphor blends for fluorescent lamps

 #50
20130134862
2013-05-30

FLUORESCENT LAMP HAVING HIGH CRI

 #51
20130116756
2013-05-09

UV-A OR UV-B-EMITTING DISCHARGE LAMP

 #52
20130113361
2013-05-09

AUXILIARY AMALGAM FOR A LOW PRESSURE DISCHARGE LAMP

 #53
20130076228
2013-03-28

Strontium phosphor blends having high CRI

 #54
20130026905
2013-01-31

FLUORESCENT LAMPS HAVING HIGH CRI AND LPW

 #55
20130020928
2013-01-24

PHOSPHOR PRECURSOR COMPOSITION

 #56
20130002123
2013-01-03

Green emitting phosphor

 #57
20130001471
2013-01-03

CORE-SHELL PHOSPHOR AND METHOD OF MAKING THE SAME

 #58
20120319011
2012-12-20

MERCURY UV LAMP WITH IMPROVED ACTINIC SPECTRUM

 #59
20120286645
2012-11-15

Lamp with phosphor composition for improved lumen performance, and method for making same

 #60
20120274454
2012-11-01

Method of writing and reproducing multimedia service by using tag and apparatus therefor

 #61
20120248966
2012-10-04

Reduced wattage gas discharge lamp

 #62
20120217866
2012-08-30

Luminophore composition for low pressure discharge lamps

 #63
20120212934
2012-08-23

Borate phosphor and white light illumination device utilizing the same

 #64
20120181480
2012-07-19

Blue phosphor, light-emitting device, and plasma display panel

 #65
20120168679
2012-07-05

Method of modifying phosphor and phosphor composition and manufacturing method of the same and phosphor solution

 #66
20120153804
2012-06-21

ULTRAVIOLET COLD CATHODE FLORESCENT LAMP

 #67
20120146486
2012-06-14

Phosphors and light-emitting devices using the same

 #68
20120126685
2012-05-24

LAMP FOR INCANDESCENT-LIKE COLOR QUALITY

 #69
20120119639
2012-05-17

Luminescent converter for a phosphor-enhanced light source

 #70
20120098411
2012-04-26

Lamp with enhanced chroma and color preference

 #71
20120068592
2012-03-22

Rare earth doped luminescent material

 #72
20120032580
2012-02-09

Phosphor blend and fluorescent lamp containing same

 #73
20120025696
2012-02-02

Phosphor coating for irregular surfaces and method for creating phosphor coatings

 #74
20120012791
2012-01-19

Alumina, luminophores and mixed compounds, and associated preparation processes

 #75
20110309738
2011-12-22

ENHANCED UV-EMITTING FLUORESCENT LAMP

 #76
20110301672
2011-12-08

UV-EMITTING DISCHARGE LAMP

 #77
20110279022
2011-11-17

Doped garnet fluorescent substance having red shift for pc LEDs

 #78
20110255265
2011-10-20

Phosphor materials and related devices

 #79
20110221329
2011-09-15

Low Pressure Discharge Lamp

 #80
20110215721
2011-09-08

Lamp using solid state source and doped semiconductor nanophosphor

 #81
20110186778
2011-08-04

Thermally stable oxynitride phosphor and light source comprising such a phosphor

 #82
20110175528
2011-07-21

Lamp using solid state source and doped semiconductor nanophosphor

 #83
20110133124
2011-06-09

Suspensions of phosphates of at least one rare earth element selected from among cerium and terbium and optionally lanthanum and luminophores produced therefrom

 #84
20110084594
2011-04-14

PHOSPHORS, FABRICATING METHOD THEREOF, AND LIGHT EMITTING DEVICES EMPLOYING THE SAME

 #85
20110037378
2011-02-17

FLUORESCENT LAMP

 #86
20110025194
2011-02-03

Phosphors having high light emission luminescence

 #87
20110018426
2011-01-27

FLUOROPHORES AND MANUFACTURING METHOD THEREOF

 #88
20110018425
2011-01-27

Emissive lamps comprising metal clusters confined in molecular sieves

 #89
20110012060
2011-01-20

Fluorescent body for use in a near-ultraviolet excitation light-emitting element

 #90
20100277059
2010-11-04

Light fixture using doped semiconductor nanophosphor in a gas

 #91
20100277057
2010-11-04

FLUORESCENT LAMP

 #92
20100270909
2010-10-28

Luminophore and lighting system having such a luminophore

 #93
20100244742
2010-09-30

VARIABLE COLOR DISCHARGE LAMP

 #94
20100237765
2010-09-23

Blue phosphor, and light-emitting device using the same

 #95
20100237764
2010-09-23

Blue phosphor, and light-emitting device using the same

 #96
20100236611
2010-09-23

SOLAR CELLS

 #97
20100219742
2010-09-02

Halophosphate phosphors and method of preparing the same

 #98
20100194265
2010-08-05

LIGHT-EMITTING MATERIALS FOR ELECTROLUMINESCENT DEVICES

 #99
20100171413
2010-07-08

PROCESS FOR THE PREPARATION OF A LINE-EMITTER PHOSPHOR

 #100
20100148658
2010-06-17

Methods for preparation of nanocrystalline rare earth phosphates for lighting applications

 #101
20100142184
2010-06-10

Fluorescent lamp, light source apparatus and display apparatus

 #102
20100141114
2010-06-10

Phosphor mixture for a discharge lamp and a discharge lamp

 #103
20100141113
2010-06-10

Blue phosphor, light-emitting device, and plasma display panel

 #104
20100109508
2010-05-06

M-C-N-O based phosphor

 #105
20100102759
2010-04-29

Light source and method for operating a lighting system

 #106
20100102704
2010-04-29

Illuminant mixture for a discharge lamp and discharge lamp, in particular an Hg low-pressure discharge lamp

 #107
20100102703
2010-04-29

Discharge lamp and illuminant compound for a discharge lamp

 #108
20100102276
2010-04-29

PHOSPHOR FOR ULTRAVIOLET EXCITED LIGHT-EMITTING DEVICE, PHOSPHOR PASTE, AND ULTRAVIOLET EXCITED LIGHT-EMITTING DEVICE

 #109
20100052508
2010-03-04

Discharge lamp and production method thereof

 #110
20100052507
2010-03-04

Fluorescent coating for high output lamps with color temperatures of less than 2700 kelvin

 #111
20100052506
2010-03-04

Blue phosphor, light-emitting device, and plasma display panel

 #112
20100052505
2010-03-04

Tanning lamp

 #113
20100051868
2010-03-04

Luminophores and core-shell luminophore precursors

 #114
20100033079
2010-02-11

Shatterproof light tube having after-glow

 #115
20100027244
2010-02-04

FLUORESCENT LAMP, AND LIGHT EMITTING DEVICE AND DISPLAY DEVICE USING FLUORESCENT LAMP

 #116
20100008060
2010-01-14

LIGHT ASSEMBLY WITH HIGH COLOR-RENDERING PROPERTY

 #117
20090322209
2009-12-31

Luminescent substance of the class of nitride silicates and light source having such a luminescent substance

 #118
20090315448
2009-12-24

PHOSPHOR, PHOSPHOR PASTE AND LIGHT EMITTING DEVICE

 #119
20090309482
2009-12-17

Phosphor for high CRI lamps

 #120
20090302236
2009-12-10

Inorganic luminescent phosphor materials for lighting

 #121
20090279283
2009-11-12

LOW-PRESSURE GAS DISCHARGE LAMP

 #122
20090273271
2009-11-05

HIGH PRESSURE METAL HALIDE LAMP

 #123
20090236970
2009-09-24

Borate phosphor and white light illumination device utilizing the same

 #124
20090230839
2009-09-17

PHOSPHOR

 #125
20090223901
2009-09-10

Dielectric barrier discharge lamp comprising an UV-B phosphor

 #126
20090213584
2009-08-27

T8 fluorescent lamp

 #127
20090206162
2009-08-20

MATERIALS FOR DATA STORAGE

 #128
20090200945
2009-08-13

Phosphor and light emitting device using the phosphor

 #129
20090195141
2009-08-06

Red phosphor and display device including the same

 #130
20090174307
2009-07-09

Fluorescent mixture for fluorescent lamp, fluorescent lamp, backlight assembly having the same and display device having the same

 #131
20090160341
2009-06-25

DISCHARGE LAMP COMPRISING UV-PHOSPHOR

 #132
20090146545
2009-06-11

LOW-MERCURY-CONSUMING FLUORESCENT LAMPS

 #133
20090134769
2009-05-28

Phosphor blend for a compact fluorescent lamp and lamp containing same

 #134
20090132595
2009-05-21

Method of writing and reproducing multimedia service by using tag and apparatus therefor

 #135
20090130484
2009-05-21

Silicate phosphor and white light emitting device including the same

 #136
20090128742
2009-05-21

METHOD OF PRODUCING FLUORESCENCE SUBSTANCE SUSPENSION, FLUORESCENT LAMP, BACKLIGHT UNIT, DIRECTLY-BELOW TYPE BACKLIGHT UNIT AND LIQUID CRYSTAL DISPLAY UNIT

 #137
20090128000
2009-05-21

INSECT ATTRACTION LIGHT SOURCE

 #138
20090127999
2009-05-21

Discharge lamp with a monolithic ceramic color converter

 #139
20090121612
2009-05-14

Cold cathode fluorescent lamp with phosphor layer formed of phosphor particles and a bonding agent including boron oxide, formed on an inner surface of a glass tube thereof

 #140
20090102391
2009-04-23

Enhanced color contrast light source

 #141
20090096958
2009-04-16

FLUORESCENT LAMP, BACKLIGHT UNIT AND LIQUID CRYSTAL DISPLAY

 #142
20090091235
2009-04-09

FLUORESCENT LAMP AND BACKLIGHT UNIT

 #143
20090051262
2009-02-26

Fluorescent substance and light emitting device using the same

 #144
20090021145
2009-01-22

Phosphor, light-emitting device, and plasma display panel

 #145
20090002603
2009-01-01

Blue Emitting Alkaline Earth Chlorophosphate Phosphor for Cold Cathode Fluorescent Lamp, and Cold Cathode Fluorescent Lamp and Color Liquid Crystal Display Using Same

 #146
20080284306
2008-11-20

Low-Pressure Mercury Vapor Discharge Lamp and Compact Fluorescent Lamp

 #147
20080266861
2008-10-30

Low-Pressure Discharge Lamp Having Improved Efficiency

 #148
20080265747
2008-10-30

PHOSPHOR, LIGHT-EMITTING MEMBER, AND IMAGE DISPLAY APPARATUS

 #149
20080265207
2008-10-30

Phosphor composition for a low-pressure discharge lamp with high color temperature

 #150
20080258601
2008-10-23

Device for generating UVC radiation

 #151
20080252193
2008-10-16

Fluorescent Lamp, Backlight Unit and Liquid Crystal Television

 #152
20080238290
2008-10-02

Low Pressure Mercury Vapor Fluorescent Lamps

 #153
20080224592
2008-09-18

FLUORESCENT LAMP FOR STIMULATING PREVITAMIN D3 PRODUCTION

 #154
20080224591
2008-09-18

Low-Pressure Mercury Discharge Lamp and Process for Its Preparation

 #155
20080224102
2008-09-18

Black conductive thick film compositions, black electrodes, and methods of forming thereof

 #156
20080211378
2008-09-04

Enhanced UV-Emitting Fluorescent Lamp

 #157
20080206691
2008-08-28

Phosphor screen in rare gas discharge device

 #158
20080203893
2008-08-28

Light-Emitting Device

 #159
20080203891
2008-08-28

Dielectric Barrier Discharge Lamp With Protective Coating

 #160
20080199728
2008-08-21

Deep red phosphor and method of manufacturing the same

 #161
20080193355
2008-08-14

Vacuum ultraviolet excited green phosphor material and light-emitting device using the same

 #162
20080191601
2008-08-14

Fluorescent Lamp for Inspecting Color Printed Matters

 #163
20080138652
2008-06-12

Fluorescent lamp having a UVB phosphor

 #164
20080136311
2008-06-12

Phosphor blends for high-CRI fluorescent lamps

 #165
20080106185
2008-05-08

Phosphor and method for producing same, and light-emitting device using same and method for manufacturing such device

 #166
20080036383
2008-02-14

Structure of fluorescent lamp

 #167
20080030120
2008-02-07

Ce,Pr-coactivated yttrium phosphate phosphor and lamp containing same

 #168
20080012465
2008-01-17

After-glow lamp

 #169
20080001518
2008-01-03

Electrodeless phototherapy lamp

 #170
20070267960
2007-11-22

Phosphor Blend and Lamp Containing Same

 #171
20070263377
2007-11-15

Luminescent lamp shade

 #172
20070247052
2007-10-25

Low-pressure gas discharge lamp comprising a UV-B phosphor

 #173
20070235690
2007-10-11

UV-emitting phosphor and lamp containing same

 #174
20070235689
2007-10-11

Ce,Pr-coactivated calcium pyrophosphate phosphor and lamp containing same

 #175
20070221883
2007-09-27

UV-emitting phosphor and lamp containing same

 #176
20070210283
2007-09-13

Ce,Pr-coactivated strontium magnesium aluminate phosphor and lamp containing same

 #177
20070200479
2007-08-30

Backlight module and illuminating device

 #178
20070170834
2007-07-26

High output fluorescent lamp with improved phosphor layer

 #179
20070161317
2007-07-12

Method for producing discharge lamps

 #180
20070132360
2007-06-14

Low-pressure vapor discharge lamp with a mercury-free gas filling

 #181
20070114908
2007-05-24

Cold cathode fluorescent lamp with mixing gas filled therein and backlight module using same

 #182
20070114561
2007-05-24

High efficiency phosphor for use in LEDs

 #183
20070079756
2007-04-12

Device and method for coating serpentine fluorescent lamps

 #184
20070069624
2007-03-29

UV-emitting phosphors, phosphor blend and lamp containing same

 #185
20070052340
2007-03-08

Bakery fluorescent lamp

 #186
20070051931
2007-03-08

Light-emitting material, light-emitting body, and light-emitting method

 #187
20070029524
2007-02-08

Phosphor and vacuum ultraviolet excited light-emitting device

 #188
20070023708
2007-02-01

Fluorescent lamp with optimized UVA/UVB transmission

 #189
20060290258
2006-12-28

Gas discharge lamp with down conversion phosphor

 #190
20060273710
2006-12-07

UVC-emitting Sr(Al,Mg)O:Pr phosphor and lamp containing same

 #191
20060267500
2006-11-30

Lamp with multi-layer phosphor coating

 #192
20060266984
2006-11-30

Black conductive thick film compositions, black electrodes, and methods of forming thereof

 #193
20060238101
2006-10-26

Lamp having good maintenance behavior of brightness and color coordinations

 #194
20060219978
2006-10-05

Method of making narrow-band UVB-emitting phosphors

 #195
20060186785
2006-08-24

METHOD OF IMPROVING LOW TEMPERATURE LUMEN MAINTENANCE OF AN ELECTRODELESS LAMP AND ELECTRODELESS LAMP WITH IMPROVED LOW TEMPERATURE LUMEN MAINTENANCE

 #196
20060150865
2006-07-13

Ultraviolet excited light-emitting device

 #197
20060145592
2006-07-06

Phosphor and method and apparatus for producing phosphor

 #198
20060132043
2006-06-22

Mercury-free discharge compositions and lamps incorporating gallium

 #199
20060113885
2006-06-01

Discharge fluorescen apparatus including fluorescent fibers

 #200
20060108910
2006-05-25

Device for generating radiation

 #201
20060103316
2006-05-18

Photocatalytic fluorescent lamp provided with an anatase TiOcoating film

 #202
20060073271
2006-04-06

Lamp tube having a uniform lighting profile and a manufacturing method therefor

 #203
20060057926
2006-03-16

Method for constructing a scotopic after-glow lamp

 #204
20060040138
2006-02-23

Method of evaluating whiteness, method of evaluating comparative whiteness, light source and luminaire

 #205
20060038162
2006-02-23

Phosphor composition for lamps

 #206
20060033418
2006-02-16

Green emitting yttrium silicate phosphor and cathode-ray tube using the same

 #207
20060023447
2006-02-02

Luminous body for generating white light

 #208
20050285537
2005-12-29

Fluorescent lamp

 #209
20050279969
2005-12-22

Europium-activated phosphors containing oxides of rare-earth and group-IIIB metals and method of making the same

 #210
20050277570
2005-12-15

Phosphor and treatment method for the same

 #211
20050264161
2005-12-01

Light emitting device

 #212
20050261751
2005-11-24

Tanning device

 #213
20050258733
2005-11-24

Fluorescent lamp and display apparatus having a fluorescent lamp

 #214
20050253527
2005-11-17

Low-pressure gas discharge lamp with an alkaline earth oxide mixture as the electron emitter substance

 #215
20050253114
2005-11-17

Phosphors containing oxides of alkaline-earth and group-IIIB metals and white-light sources incorporating same

 #216
20050248276
2005-11-10

Phosphorescent phosphor powder, manufacturing method thereof and afterglow fluorescent lamp

 #217
20050242736
2005-11-03

Incandescent lamp

 #218
20050242735
2005-11-03

Fluorescent lamp for emitting visible radiation

 #219
20050242701
2005-11-03

Fluorescent lamp

 #220
20050242327
2005-11-03

Phosphors containing oxides of alkaline-earth and group-13 metals, and light sources incorporating the same

 #221
20050236959
2005-10-27

High lumen output fluorescent lamp with high color rendition

 #222
20050206296
2005-09-22

Phosphor coating composition for a mercury low-pressure discharge lamp for illuminating plants

 #223
20050179389
2005-08-18

Cold cathode fluorescent lamp and backlight unit

 #224
20050179358
2005-08-18

Optimized phosphor system for improved efficacy lighting sources

 #225
20050168125
2005-08-04

Phosphors containing phosphate and/or borate of metals of group IIIA, group IVA, and lanthanide series, and light sources incorporating the same

 #226
20050162078
2005-07-28

Flat, flexible fluorescent lamp

 #227
20050161639
2005-07-28

Phosphor and device using the same

 #228
20050156503
2005-07-21

Phosphors containing boron and rare-earth metals, and light sources incorporating the same

 #229
20050151460
2005-07-14

Vacuum ultraviolet excited green phosphor material and light-emitting device using the same

 #230
20050136194
2005-06-23

Device and method for coating serpentine fluorescent lamps

 #231
20050104522
2005-05-19

Compact self-ballasted fluorescent lamp, fluorescent lamp and helical glass tube

 #232
20050092968
2005-05-05

Phosphors containing boron and metals of Group IIIA and IIIB

 #233
20050073239
2005-04-07

Light sources with nanometer-sized VUV radiation-absorbing phosphors

 #234
20050062423
2005-03-24

Fluorescent lamp and lighting appliance using thereof

 #235
20050062397
2005-03-24

Fluorescent lamp and lighting device

 #236
20050035332
2005-02-17

Method of manufacturing phosphor powder, phosphor powder, and phosphor composition

 #237
20050023955
2005-02-03

Alkaline earth aluminate phosphor for a cold cathode fluorescent lamp and cold cathode fluorescent lamp

 #238
20050010249
2005-01-13

Narrow-band UV-B phototherapeutic device

 #239
20050007021
2005-01-13

Rare-gas low-pressure discharge lamp, method of manufacturing a rare-gas low-pressure discharge lamp, and application of a gas discharge lamp

 #240
20050001533
2005-01-06

Discharge lamp with an arrangement of phosphor layers excitable by VUV and UVA radiation

 #241
18321047
2024-03-12

Far-UVC light source with an internal dielectric coating filter arranged on the interior side of electrode

 #242
15856422
2019-03-19

Lumen maintenance in fluorescent lamps