Effects of new light sources on task switching and mental rotation performance

Ferlazzo, Fabio; Piccardi, Laura; Burattini, Chiara; Barbalace, M.; Giannini, Anna Maria; Bisegna, Fabio

doi:10.1016/j.jenvp.2014.03.005

Cited by 72 publications

(45 citation statements)

References 24 publications

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“…For this reason the luminance in the tunnel must decrease until reaching 1 cd/m 2 . This is important to save energy and avoid the opposite problem: the driver passes from the dark of the outside to the artificial light of the tunnel and, while entering, he must not be dazzled by a light which is too strong [16,17]. In order to modulate both diurnal and nocturnal luminance values, the system must have sources with an uninterrupted service able to guarantee permanent lighting and sources able to reinforce the lighting used by day only.…”

Section: The Case Studymentioning

confidence: 99%

Energy Optimization of Road Tunnel Lighting Systems

et al. 2015

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A road tunnel is an enclosed and covered infrastructure for the vehicular traffic. Its lighting system provides 24 h of artificial sources only, with a higher amount of electric power used during the day. Due to safety reasons, when there is natural lighting outside the tunnel, the lighting levels in the stretches right after the entrance and before the exit must be high, in order to guide the driver's eye towards the middle of the tunnel where the luminance must guarantee safe driving, avoid any over-dimensioning of the lighting systems, and produce energy savings. Such effects can be reached not only through the technological advances in the field of artificial lighting sources with high luminous efficiency, but also through new materials for road paving characterized by a higher reflection coefficient than other ordinary asphalts. This case study examines different technical scenarios, analyzing and comparing possible energy and economic savings. Traditional solutions are thus compared with scenarios suggesting the solutions previously mentioned. Special asphalts are interesting from an economic point of view, whereas the high costs of LED sources nowadays represent an obstacle for their implementation. OPEN ACCESSSustainability 2015, 7 9665

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Section: The Case Studymentioning

confidence: 99%

Energy Optimization of Road Tunnel Lighting Systems

et al. 2015

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“…With their efficacy, approaching that of fluorescent lamps, their long durability, small size and low weight, LEDs are very often used to replace existing lamps [9][10][11]. These new applications have placed increasingly stringent demands on the optical characterization of LEDs, which serves as the fundamental baseline for product quality and product design [8,[12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Blue Light Hazard and Risk Group Classification of 8 W LED Tubes, Replacing Fluorescent Tubes, through Optical Radiation Measurements

et al. 2015

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Abstract:In this paper, the authors discuss the results of a measurement survey of artificial optical radiation emitted by 8 W LED tubes suitable for the substitution of 18 W fluorescent lamps used for general lighting. For both types of lamps, three different color temperatures were chosen, 3000 K, 4000 K, and 6000 K. These measurements were performed to evaluate the photobiological safety of the sources. The radiance and irradiance values have been measured in a wide range of wavelengths (180-3000 nm). The measurement results obtained for the LED tubes have been compared to those of similar measurements obtained for fluorescent lamps. The analysis has been focused on the range of wavelengths 300-700 nm, the blue light range, which turned out to be defining for the risk groups of the lamps. This classification is a function of the maximum permissible exposure time as indicated in the European Standard EN 62471 on the photobiological safety of lamps and lamp systems.

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“…The lighting requirements for indoor sports facilities are specified in Europe, in the Technical Standard EN 12193 [17]. In addition to the lighting requirements, it is important also a verification of the photobiological safety and the health effects of the lighting sources, to whose emissions the athletes can be exposed for several hours a day [23][24][25][26], in accordance to what should be done for other environments intended for the permanence of people [27][28][29][30].…”

Section: Lighting Requirements In Sports Facilitiesmentioning

confidence: 99%

LED Lighting for Indoor Sports Facilities: Can Its Use Be Considered as Sustainable Solution from a Techno-Economic Standpoint?

et al. 2016

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Abstract:In this paper, the authors propose a techno-economic comparative analysis between different lighting solutions, using, respectively, floodlight with metal halide lamps, luminaires with fluorescent lamps and LED floodlights. The comparison is aimed to identify general criteria for assessing the techno-economic sustainability of the use of LED lighting for indoor sports facilities, since this solution is very often proposed to achieve a reduction of the electrical power for lighting. From a technical standpoint, the analysis takes into particular consideration the aspects related to the satisfaction of lighting requirements, safety and energy efficiency. From an economic standpoint the investment, the operating and the maintenance costs are evaluated. To make comparisons on an economic basis, specific indicators are used. From the obtained results it is possible to highlight as the solution that uses the LED floodlights is characterized by highest energy efficiency. This solution requires a smaller number of luminaires and it has limited maintenance costs compared to the other solutions, but it has high investment costs, which involve reasonable payback times only when the sports facility is used intensively and for competitions of high level.

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Effects of new light sources on task switching and mental rotation performance

Cited by 72 publications

References 24 publications

Energy Optimization of Road Tunnel Lighting Systems

Energy Optimization of Road Tunnel Lighting Systems

Blue Light Hazard and Risk Group Classification of 8 W LED Tubes, Replacing Fluorescent Tubes, through Optical Radiation Measurements

LED Lighting for Indoor Sports Facilities: Can Its Use Be Considered as Sustainable Solution from a Techno-Economic Standpoint?

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