Comparative Analysis Of The Characteristics Of Led Filament Lamps For Household Lighting

2020 ◽  
pp. 71-75
Author(s):  
Nina P. Nestyorkina ◽  
Yulia A. Zhuravlyova ◽  
Olga Yu. Kovalenko ◽  
Svetlana A. Mikaeva
Keyword(s):  
Comparative Analysis ◽  
Radiation Spectrum ◽  
Experimental Studies ◽  
Luminous Flux ◽  
Measuring System ◽  
Test Results ◽  
Russian Company ◽  
Colour Temperature ◽  
Colour Rendering ◽  
Filament Lamps

This paper examines the characteristics of LED filament lamps from various manufacturers: LLC “ Lisma “(Russia), an American company with production in China “ GENERAL LIGHTING CO.LTD”, a joint Chinese-Russian company “ Uniel “and Taiwan company” Smartbuy “ in the A60 bulb – the time of stabilization of characteristics, luminous flux, colour temperature, colour rendering index, flicker index, radiation spectrum during 6000 hours of burning. The research was carried out on the Gooch&Housego measuring system. The results of experimental studies that showed that the clear leader in the test results is the lamp SDF‑8 (LISMA), according to GOST of all tested samples of led filament lamps, it can be recommended for lighting in lighting devices for household lighting.

Research Of Long-Term Lighting Tests Of Led retrofit And Filament Lamps

2021 ◽  
pp. 62-69
Author(s):  
Nina P. Nesterkina ◽  
Yulia A. Zhuravlyova ◽  
Evgeny A. Kuznetsov ◽  
Evgeny S. Shichavin ◽  
Maksim S. Shishkanov
Keyword(s):  
Form Factor ◽  
Comparative Studies ◽  
Spectral Distribution ◽  
Radiation Flux ◽  
Luminous Flux ◽  
Test Results ◽  
Colour Temperature ◽  
Engineering Characteristics ◽  
Filament Lamps

The paper analyzes the results of comparative studies of the light and engineering characteristics of LED retrofit lamps and filament lamps of the A60 form factor of nine manufacturers: Uniel (Russia – China), JazzWay (Russia – China), Philips (the Netherlands), Ecola (China), Wolta (Germany), Feron (Russia), Rev (Germany), Osram (Germany), Forza (China) – luminous flux, power consumption, correlated colour temperature, luminous efficacy, flicker index, spectral distribution of the radiation flux density during 6000 hours of lamps burning. The test results show that: а) the measured value of the initial luminous flux of all LED retrofit lamps corresponds to the declared; б) the measured value of the initial luminous flux of filament LED lamps is lower than the declared values by an average of 19 %; в) high value of the luminous flux maintenance factor after 6000 hours of burning among LED retrofit lamps showed Uniel LED10 W 4000 К (94.5 %), Philips Essential LED9 W 6500 K (96.2 %), Wolta LX 12 W 3000 К (95.3 %), for JazzWay PLED-SP 10 W 5000 K and Ecola Classic LED10.2 W 4000 K lamps, the luminous flux maintenance factor was less than 90 %; г) the luminous flux maintenance factor after 6000 hours of burning of all filament LED lamps ranged from 91.3 % to 96.4 %, except for the Feron LB‑57 7 W 2700 K lamp – 89.3 %. According to the test results, only for the Uniel LED10 W 4000 K lamp, the measured values of the light and engineering characteristics and the flicker index, including after 6000 hours of burning, correspond to the declared ones. The high luminous flux maintenance factor after 6000 hours of burning allows this lamp to be classified as A-category in terms of decreasing luminous flux.

The effects of temperature and driving current on the key parameters of commercially available, high-power, white LEDs

2016 ◽  
Vol 48 (8) ◽  
pp. 943-965 ◽  
Author(s):  
MB Yurtseven ◽  
S Mete ◽  
S Onaygil
Keyword(s):  
High Power ◽  
Thermal Characteristics ◽  
Luminous Flux ◽  
Light Sources ◽  
Economic Optimization ◽  
Colour Temperature ◽  
White Leds ◽  
Driving Current ◽  
Effects Of Temperature ◽  
Colour Rendering

High-power LEDs with high luminous efficacies, compact sizes, long lifetimes and a wide colour range, are rapidly taking the place of conventional light sources in general lighting applications. But these properties of high-power LEDs are dependent on temperature and driving current. In this study, 24 samples of commercially available, high-power, white LEDs were measurement for their electrical, optical and thermal characteristics as well as their efficiency, luminous flux, luminous efficacy, correlated colour temperature and colour rendering index over six temperature steps at three different driving currents. LED manufacturers' catalogues including such information will allow consistency between the design and application stages of an installation. Also, it will make the technical and economic optimization of luminaires using high-power LEDs easier.

Analysis of Characteristics of Halogen and LED Automobile Lamps

2020 ◽  
pp. 57-62
Author(s):  
Olga Yu. Kovalenko ◽  
Yulia A. Zhuravlyova
Keyword(s):  
Power Consumption ◽  
Flip Chip ◽  
Weather Conditions ◽  
Luminous Flux ◽  
Luminous Efficacy ◽  
Colour Temperature ◽  
Study Results ◽  
Calculation Results ◽  
Mandatory Rules ◽  
Halogen Lamps

This work contains analysis of characteristics of automobile lamps by Philips, KOITO, ETI flip chip LEDs, Osram, General Electric (GE), Gtinthebox, OSLAMPledbulbs with H1, H4, H7, H11 caps: luminous flux, luminous efficacy, correlated colour temperature. Characteristics of the studied samples are analysed before the operation of the lamps. The analysis of the calculation results allows us to make a conclusion that the values of correlated colour temperature of halogen lamps are close to the parameters declared by manufacturers. The analysis of the study results has shown that, based on actual values of correlated colour temperature, it is not advisable to use LED lamps in unfavourable weather conditions (such as rain, fog, snow). The results of the study demonstrate that there is a slight dispersion of actual values of luminous flux of halogen lamps by different manufacturers. Maximum variation between values of luminous flux of different lamps does not exceed 14 %. The analysis of the measurement results has shown that actual values of luminous flux of all halogen lamps comply with the mandatory rules specified in the UN/ECE Regulation No. 37 and luminous flux of LED lamps exceeds maximum allowable value by more than 8 %. Luminous efficacy of LED lamps is higher than that of halogen lamps: more than 82 lm/W and lower power consumption. The results of the measurements have shown that power consumption of a LED automobile lamp is lower than that of similar halogen lamps by 3 times and their luminous efficacy is higher by 5 times.

Analysis of Characteristics of LED Lamps with T8 Bulb by Various Manufacturers

2019 ◽  
pp. 82-87
Author(s):  
Nina P. Nestyorkina ◽  
Olga Yu. Kovalenko ◽  
Yulia A. Zhuravlyova
Keyword(s):  
Supply Voltage ◽  
Luminous Flux ◽  
Supply Network ◽  
Operational Characteristics ◽  
Nominal Voltage ◽  
Electric Parameters ◽  
The Moment ◽  
Colour Rendering

The article analyses the operational characteristics of 10W LED lamps with T8 bulb manufactured by ASD (Russia), Smartbuy (Taiwan), and VOLPE (PRC) and 18W FL with T8 bulb manufactured by PHILIPS (Poland) including the dependence of these lamps on the supply voltage. The results of measurements show that: a) the period of stabilisation of electric parameters and luminous flux of LED lamps does not cause discomfort of illumination unlike the said FL, the luminous flux of which at the moment of switching on is 70 % of the nominal value, which is reached after 13 minutes; b) with nominal voltage of supply network, the value of luminous flux of 10W ASD LED-T8R-STD LED lamp (Russia) is 6 % less than the declared one, and that of Smartbuy SBL-T8-10-64K-A (Taiwan) and VOLPE LED-T8-10W/DW/G13/FR/FIX/N (PRC) is even less; c) the general colour rendering index of all studied LED lamps is less than the declared one (72 instead of 80); d) the flicker index of all studied LED lamps does not exceed the declared value of 5 %; e) the characteristics of LED lamps almost do not depend on changes of the supply voltage within the range of ±10 %. The recommendations regarding the application of the studied LED lamps are given.

Measurement and Analysis on Transient Thermal Characteristics of High Speed Motorized Spindle

2011 ◽  
Vol 52-54 ◽  
pp. 2021-2026
Author(s):  
Gui Ling Deng ◽  
Can Zhou
Keyword(s):  
High Speed ◽  
Thermal Deformation ◽  
Thermal Characteristics ◽  
Measuring System ◽  
Test Results ◽  
Motorized Spindle ◽  
Measurement And Analysis ◽  
Turning Center ◽  
Transient Thermal ◽  
Deformation Compensation

Thermal deformation is an important factor to affect the accuracy of the motorized spindle, the core component of high-speed machine tool. To understand the spindle system transient thermal characteristics of the high-speed turning center CH7516GS, some high-precision sensors and high-frequency data acquisition system is used to establish the temperature and displacement measuring system. The thermal deformation compensation model is established on the basis of the experimental test results.

The Analysis of Stress Distribution of Hammer Bottom during Dynamic Compaction on Sandy Soil Foundation

2011 ◽  
Vol 250-253 ◽  
pp. 1460-1463
Author(s):  
Jian Qi Wu ◽  
Jian Hong Deng ◽  
Xiao Ping Wang
Keyword(s):  
Comparative Analysis ◽  
Stress Distribution ◽  
Sandy Soil ◽  
Field Monitoring ◽  
Dynamic Compaction ◽  
Dry Density ◽  
Test Results ◽  
Red Sandstone ◽  
Soil Foundation

Obtained stress distribution of hammer bottom according to the analysis of horizontal and vertical red sandstone fill dry density of the hammer bottom after dynamic compaction; affirmed the stress distribution situation of the hammer bottom through comparative analysis of the test results by laboratory and field monitoring.

Research Note: LED chip-on-board packaging technology for strict colour tolerance

2017 ◽  
Vol 49 (8) ◽  
pp. 1052-1057
Author(s):  
J Zhang ◽  
P Ge ◽  
Z Zhou ◽  
D Liu ◽  
H Wang ◽  
...  
Keyword(s):  
Research Note ◽  
Luminous Efficacy ◽  
Packaging Technology ◽  
Colour Temperature ◽  
Colour Rendering ◽  
Method Show

In the field of LED packaging, people usually pay more attention to colour temperature, luminous efficacy and colour rendering than colour tolerance. This paper focuses on how to meet strict colour tolerances in the process of chip-on-board packaging. The McAdam ellipses are used to explain the meaning of colour tolerance. A method based on adjusting the amount of phosphor glue and the proportions of different phosphors it contains is described. Measurements on samples packaged according to this method show that it makes it possible to meet strict colour tolerance requirements.

scholarly journals ДОСЛІДЖЕННЯ ГІГІЄНІЧНИХ ВЛАСТИВОСТЕЙ МАТЕРІАЛІВ НАТІЛЬНОЇ ЛІКАРНЯНОЇ БІЛИЗНИ

2020 ◽  
Vol 140 (6) ◽  
pp. 38-47
Author(s):  
І. О. Іванов ◽  
Н. П. Супрун ◽  
Ю. О. Ващенко
Keyword(s):  
Comparative Analysis ◽  
Materials Science ◽  
Experimental Studies ◽  
Operating Conditions ◽  
Raw Material ◽  
Experimental Investigations ◽  
Textile Materials ◽  
Composition And Structure ◽  
Innovative Materials ◽  
Basic Functions

Investigation of the influence of the peculiarities of raw material composition and structure of traditional and innovative linen textile materials on their hygienic properties. Theoretical and experimental investigations are based on the main positions of textile materials science. In experimental studies, modern standardized methods for determining the hygienic properties of textile materials were used, as well as techniques specially developed taking into account the peculiarities of the operating conditions of underwear. The peculiarities of the operating conditions and the basic functions of hospital underwear were determined. The comparative analysis of hygienic properties of traditional and modern fabrics for underwear was carried out. Using the standardized and the developed methods, adapted to the peculiarities of the conditions of use of the products, the indicators characterizing the processes of water absorption of the materials were experimentally determined. On the basis of the obtained values of quality indicators, a comprehensive assessment of the ability of materials to transfer moisture and air, with the calculation of the arithmetic complex quality index was done. This allowed to determine the material that is optimal in properties, which provides thermophysiological comfort when operating hospital underwear. Using the developed methods, which take into account the specifics of the operating conditions, a comparative analysis of the hygienic properties of traditional and innovative materials for underwear was carried out. A new range of textile materials for underwear has been proposed, taking into account the peculiarities of the operational situation of consumption.

scholarly journals STUDENTS’ PHYSICAL QUALITY "JUMPING" IN NON-PHYSICAL EDUCATION UNIVERSITIES

2021 ◽  
Vol 5 ◽  
pp. 104-108
Author(s):  
Valery A. Lopatin
Keyword(s):  
Comparative Analysis ◽  
Physical Education ◽  
Physical Culture ◽  
Test Results ◽  
Physical Quality ◽  
Sports Clubs ◽  
Literary Sources ◽  
Practical Research ◽  
Human Motor ◽  
Motor Actions

Students’ physical quality “jumping" in non-physical education university is discussed in the article. Complementary characteristics of "jumping ability" described by scientists in different years are given and literary sources of scientists on this problem are analyzed. The article provides the results of practical research based on the Abalakov’s test for measuring jumping ability among students at elective physical culture lessons and a comparative analysis of the test results is presented. Sport that shows the highest jumping ability as an important component of harmony in human motor actions is revealed. Activities at University sports clubs are recommended.

scholarly journals HUBUNGAN PIJAT BAYI DENGAN PERKEMBANGAN MOTORIK BAYI USIA 1 – 12 BULAN DI DESA PUNDUNGSARI BULU SUKOHARJO

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Rahayu Setyaningsih ◽  
Kristiani Eka Prasetyo Wat ◽  
Asri Utami
Keyword(s):  
Rapid Growth ◽  
Experimental Studies ◽  
Sampling Technique ◽  
Test Results ◽  
Infant Massage ◽  
Chi Square ◽  
The Public ◽  
Touch Therapy ◽  
Mother And Child ◽  
Long Time

AbstractIntroduction: Infant massage is a touch therapy oldest known to the public. Infant massage is one of the communication between mother and child is communication through touch. Infant massage has been known to man for a long time and reduced down - generations. Age 1-12 months is a period of rapid growth that is traversed by the child, including motoric development. Infant massage can provide a stimulus to promote weight and to increase motoric development.The purpose: Of this study was to correlate of infant massage and motoric development in infants aged 1-12 months in District Pundungsari Bulu Sukoharjo.The subjects: Were mother with infants aged 1-12 months, in the District Pundungsari. Sampling is done with total sampling technique. They are 33 sample in this research.Methods: This study was a non-experimental studies, correlation approach. Data obtained by the method of questionare, which is mother has filled the questionare about baby massage in infants aged 1-12 months and motoric development. The data have been collected and analyzed by chi square with p= 0.05. The research found that respondents do baby massage with continue and not continue and motoric development found delayed, normal and advance. After the test results obtained chi square p 0.000 to p <0.05, which means Ha accepted and Ho rejected.The conclusion: Of this study is infant massage correlate with motoric development in infants aged 1-12 months in District Pundungsari Bulu Sukoharjo.Keywords: Infant massage, motoric development

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