The Design of Stabilized Power Supplies for Incandescent Light Sources

Light-emitting diodes (LEDs) differ from incandescent light sources in several ways that are relevant to energy and maintenance requirements of airfield lighting systems. They have higher luminous efficacy and, when designed properly, have longer useful operating lives; both factors make LEDs attractive candidates for airfield lighting. The photometric, colorimetric, and temporal characteristics of LEDs also differ from those of incandescent light sources, and these can have important implications for the appearance of runway and taxiway lighting systems. The present paper reviews publications summarizing experimental and analytical investigations designed to assess these implications with respect to the following human factors impacts: color identification, brightness and glare, visibility in fog and haze, response to onset of flashing lights, and stroboscopic effects such as the phantom array. Overall, this review of experimental evidence suggests that, in addition to their reduced energy use and maintenance requirements, LED airfield lighting can be advantageous in comparison with incandescent lighting systems used to delineate airport runways and taxiways.

Download Full-text

Brighter incandescent light sources from the black metal

10.1117/12.847901 ◽

2010 ◽

Author(s):

Anatoliy Y. Vorobyev ◽

Chunlei Guo

Keyword(s):

Light Sources ◽

Incandescent Light ◽

Black Metal

Download Full-text

Fluorescent incandescent light sources from individual quadrilateral ZnO microwire via Ga-incorporation

Optics Express ◽

10.1364/oe.27.033298 ◽

2019 ◽

Vol 27 (23) ◽

pp. 33298 ◽

Cited By ~ 4

Author(s):

Wangqi Mao ◽

Mingming Jiang ◽

Jiaolong Ji ◽

Yang Liu ◽

Caixia Kan

Keyword(s):

Light Sources ◽

Incandescent Light

Download Full-text

DESIGN AND IMPLEMENTATION OF A PID-BASED LUMINANCE CONTROL AND LIGHT SENSING USING SMOOTHING AVERAGING TECHNIQUE

Jurnal Teknologi ◽

10.11113/jt.v78.8920 ◽

2016 ◽

Vol 78 (6-3) ◽

Author(s):

Editha Macorol ◽

Favis Joseph Balinado ◽

Leo M. Flores ◽

Ezekiel V. Pascual ◽

Christian M. Silva ◽

...

Keyword(s):

Light Emitting Diode ◽

Luminance Level ◽

Light Sources ◽

Averaging Technique ◽

Light Emitting ◽

Incandescent Light ◽

Light Sensing ◽

Light Stimuli ◽

Compact Fluorescent Lamp ◽

Global Energy Consumption

Nowadays, lighting shares a large part in the global energy consumption, lighting consumption can be easily reduced with the use of efficient light sources. The most commonly used light source is the incandescent light bulb. As time passed by, Compact Fluorescent Lamp and Light Emitting Diode use became prevalent because of their advantages over the incandescent light. The researchers were able to develop and implement a PID controlled lighting system using Light Emitting Diode utilizing the smoothing-averaging technique in its sensors. Tests were done with the system with and without smoothing technique to identify the effect of the technique used. The system automatically varies its light intensity output depending on the light stimuli maintaining the luminance level of the laboratory based on standards.

Download Full-text

The preferences of hens for compact fluorescent over incandescent lighting

Canadian Journal of Animal Science ◽

10.4141/cjas92-027 ◽

1992 ◽

Vol 72 (2) ◽

pp. 203-211 ◽

Cited By ~ 31

Author(s):

Tina M. Widowski ◽

Linda J. Keeling ◽

Ian J. H. Duncan

Keyword(s):

Key Words ◽

Central Compartment ◽

Fluorescent Light ◽

Light Sources ◽

Frequency Distributions ◽

Incandescent Light ◽

Video Cameras ◽

Nest Boxes ◽

Testing Chamber ◽

Ingestive Behaviour

To determine whether laying hens find the flicker of fluorescent light aversive, their preferences were tested individually in a two-room testing chamber in which each room could be illuminated by either incandescent or fluorescent lights. The rooms were joined by a central compartment which acted as a light baffle and through which the birds could easily pass. The level of illumination in the two rooms was carefully matched and other resources such as food, water and nest-boxes were available in both rooms. The preferences of 16 mature light hybrid hens which had experience of both fluorescent and incandescent lighting were recorded during a 6-h test period on each of 2 d with the light sources in the rooms being switched on the second day. Overhead video cameras recorded the position and the behaviour of the birds throughout testing. On each of the test days, the hens spent significantly more time in fluorescent light than they did in incandescent light (each day: P < 0.01). When data from both test days were combined, the birds spent on average 73.2% of their time under fluorescent light and only 26.8% under incandescent (P < 0.001). Frequency distributions of ingestive behaviour, nesting, preening, resting and walking indicated that the birds performed all activities in both rooms and in both types of light. These results indicate that the birds either did not perceive the flicker of the fluorescent lights or perceived the flicker and did not find it aversive, and that they found some aspect of the fluorescent light more attractive than incandescent. Key words: Lighting, fluorescent, incandescent, behaviour, poultry

Download Full-text