Light trespass and_pollution[1]
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This document discusses the problems of light trespass and light pollution from outdoor lighting. It defines light trespass as unwanted light falling beyond the intended area, which can cause spill light and brightness issues that negatively impact neighbors and drivers. Common offenders are street lights, sports fields, and commercial lighting using excessive lamps. Solutions include using luminaires that control light above the horizontal plane like cut-off designs, shields to reduce reflections, and reviewing lighting systems. The document also discusses how light pollution affects the environment and sea turtles and birds, and how the LEED program addresses light pollution reduction.
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The document discusses sustainable lighting design and addresses several key topics in 3 paragraphs or less:
1. Lighting designers must consider social, economic, and environmental factors when designing lighting. This includes using daylight whenever possible and directing light only to the intended task to save energy.
2. Basic lighting needs include visibility, visual comfort, and safety, while sustainability requires considering the environment and energy savings. Light pollution can be reduced by preventing glare, light trespass, visual clutter and overlighting.
3. Sky glow over urban areas is caused by improperly aimed lights that emit light above the horizontal. This disrupts ecosystems and astronomy. Solutions include shielding lights, directing them downward, and only lighting areas
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Outdoor lighting is essential for enjoying a home's landscaping in the evenings. Many homeowners are now preferring indirect lighting that reflects off surfaces to create ambiance. LED lights are also becoming more popular due to their energy efficiency and small size, which allows creative placements. A trend is simplicity with fewer, strategically placed lights that illuminate walkways and gardens without excess. Proper lighting helps homeowners fully utilize and appreciate their outdoor spaces at night.
Light Pollution
Light pollution is caused by poorly designed lighting that shines light upward and outward instead of focusing it downward. There are two types of light pollution: light glare, which is unused light shining up and out, and light trespass, which lights up windows and property. Streetlights are a major contributor, accounting for 35-50% of light pollution. Light pollution wastes energy, disrupts ecosystems and human health and psychology, and interferes with astronomy. Solutions include using fully shielded fixtures, turning lights off after hours, and reducing light levels on storefronts and parking lots. Light pollution is one of the most easily addressed types of pollution.
Light pollution
This document discusses the topic of light pollution. It begins with an introduction that defines light pollution and describes how artificial light at night scatters in the atmosphere, degrading views of the night sky. It then discusses the different types of light pollution including sky glow, glare, light trespass, and overlighting. The causes of light pollution are listed as excessive and unnecessary use of outdoor lighting along with improper lighting fixtures and designs. The effects of light pollution are outlined as negative impacts on human health, disruption to nocturnal wildlife, and effects on flora. The document concludes with recommendations for mitigation of light pollution through improved lighting fixtures and light sources that direct light downward rather than polluting the night sky.
Glare
Glare occurs when lighting is brighter than the general environment and can cause eye fatigue, discomfort, and reduced visibility. There are two main types: direct glare from bright luminaires in the field of vision, and reflected glare from reflections off glossy surfaces. Glare is evaluated using various systems that measure luminance levels and angles to determine if lighting installations meet comfort standards for most people. Methods for minimizing glare involve shielding luminaires, increasing side lighting, and using curtains or blinds on windows.
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The document discusses ways to reduce glare from lighting. It defines different types of glare including direct, reflected, discomfort, and disability glare. It provides tips to fix glare such as moving the light source, object, or observer's position. Other suggestions are reducing the brightness of the light source, increasing the brightness of surroundings, and changing the reflectance of surfaces to decrease contrast. The full article about reducing glare can be found on the IESLightLogic.org website.
PLS 2019: Glare
Glare can be caused by disability glare or discomfort glare. Disability glare reduces visibility while discomfort glare causes pain. The Threshold Increment (T.I.) measure quantifies disability glare in road lighting but does not account for discomfort glare or factors like source size. T.I. values should be adjusted upwards for older drivers as glare impacts increase with age. For complex areas like junctions, the Glare Rating (GR) measure may provide a better assessment of disability glare than T.I. or G-classes. Further research is needed on how source size, particularly of LEDs, affects glare.
Daylighting ain shams.post graduate 2014
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1. Lighting designers must consider social, economic, and environmental factors when designing lighting. This includes using daylight whenever possible and directing light only to the intended task to save energy.
2. Basic lighting needs include visibility, visual comfort, and safety, while sustainability requires considering the environment and energy savings. Light pollution can be reduced by preventing glare, light trespass, visual clutter and overlighting.
3. Sky glow over urban areas is caused by improperly aimed lights that emit light above the horizontal. This disrupts ecosystems and astronomy. Solutions include shielding lights, directing them downward, and only lighting areas
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Light pollution is caused by poorly designed lighting that shines light upward and outward instead of focusing it downward. There are two types of light pollution: light glare, which is unused light shining up and out, and light trespass, which lights up windows and property. Streetlights are a major contributor, accounting for 35-50% of light pollution. Light pollution wastes energy, disrupts ecosystems and human health and psychology, and interferes with astronomy. Solutions include using fully shielded fixtures, turning lights off after hours, and reducing light levels on storefronts and parking lots. Light pollution is one of the most easily addressed types of pollution.
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This document discusses the topic of light pollution. It begins with an introduction that defines light pollution and describes how artificial light at night scatters in the atmosphere, degrading views of the night sky. It then discusses the different types of light pollution including sky glow, glare, light trespass, and overlighting. The causes of light pollution are listed as excessive and unnecessary use of outdoor lighting along with improper lighting fixtures and designs. The effects of light pollution are outlined as negative impacts on human health, disruption to nocturnal wildlife, and effects on flora. The document concludes with recommendations for mitigation of light pollution through improved lighting fixtures and light sources that direct light downward rather than polluting the night sky.
Glare
Glare occurs when lighting is brighter than the general environment and can cause eye fatigue, discomfort, and reduced visibility. There are two main types: direct glare from bright luminaires in the field of vision, and reflected glare from reflections off glossy surfaces. Glare is evaluated using various systems that measure luminance levels and angles to determine if lighting installations meet comfort standards for most people. Methods for minimizing glare involve shielding luminaires, increasing side lighting, and using curtains or blinds on windows.
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The document discusses ways to reduce glare from lighting. It defines different types of glare including direct, reflected, discomfort, and disability glare. It provides tips to fix glare such as moving the light source, object, or observer's position. Other suggestions are reducing the brightness of the light source, increasing the brightness of surroundings, and changing the reflectance of surfaces to decrease contrast. The full article about reducing glare can be found on the IESLightLogic.org website.
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Glare can be caused by disability glare or discomfort glare. Disability glare reduces visibility while discomfort glare causes pain. The Threshold Increment (T.I.) measure quantifies disability glare in road lighting but does not account for discomfort glare or factors like source size. T.I. values should be adjusted upwards for older drivers as glare impacts increase with age. For complex areas like junctions, the Glare Rating (GR) measure may provide a better assessment of disability glare than T.I. or G-classes. Further research is needed on how source size, particularly of LEDs, affects glare.
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Light quality affects human behaviour, health, comfort and mood.
"Space and light and order. Those are the things that men need just as much as they need bread or a place to sleep“ -Le Corbusier, August27,1965
Light, space and human they effect and work with each other.
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Light quality affects human behaviour, health, comfort and mood.
"Space and light and order. Those are the things that men need just as much as they need bread or a place to sleep“ -Le Corbusier, August27,1965
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Different metals and filler gasses can be used to provide a range of colour and brightness.
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The document discusses lighting design for landscapes, building facades, and sites. It emphasizes the importance of designing lighting that considers community goals, themes, and minimizing light pollution and light trespass. A lighting designer can help achieve a creative vision through technical specifications and layered lighting designs.
Landscape, Building Facade, And Parking Lot
1. The document discusses lighting design considerations for landscape, building facades, and sites. It covers the need for lighting, community-responsive design, safety and security lighting, light pollution, and hiring a lighting designer.
2. Key factors in lighting design include determining community goals, developing a theme, selecting appropriate luminaires, controlling glare and light trespass, and providing layered lighting that highlights important areas.
3. Calculations can increase confidence that a lighting design will achieve the desired visual effects, while a lighting designer can envision and technically specify lighting solutions.
The illumination
The document discusses different aspects of illumination and lighting. It defines illumination as the quantity of light falling on a surface and discusses factors that determine quality of lighting such as glare, shadows and contrast. It then describes different lighting schemes such as direct, indirect, semi-direct and general lighting. It also discusses types of lamps including incandescent, fluorescent, LED and OLED. The document recommends lux levels for different indoor activities and emphasizes the importance of energy efficient lighting and integrating daylight with electric lighting.
(5) bs-ii-electricity-unit-v-2012-five
The document discusses lighting calculation methods and standards. It provides the lumen method formula for calculating lighting levels: Lux x Area / Lumen Output x Maintenance Factor x Utilization Factor. It lists recommended illumination levels for various spaces from 50-1500 lux depending on the task. It also discusses controlling glare through limiting luminance of light sources, positioning luminaires out of the field of view, and maintaining small source sizes.
Light & luminous
The document discusses different types of lighting used in architecture, including natural lighting from the sun and artificial lighting sources. It describes several types of architectural luminaires - soffits, valances, and coves - that are used to direct light downward or both upward and downward to provide wall washing and general lighting. Precautions for installing different luminaires and options for shielding lighting elements are also covered.
Illumination basic and lightning scheme
The document discusses various topics related to lighting schemes and electrical lighting. It defines key terms like light, luminous flux, luminous intensity and illumination. It describes different types of lighting schemes and various electrical lamps like filament lamps, sodium vapor lamps, mercury vapor lamps, fluorescent tubes, neon lamps, and halogen lamps. Key factors to consider for an indoor light scheme include adequate illumination levels, uniform light distribution, avoiding glare and shadows, and suitable light quality.
Measuring Light Pollution - How New Technology is Making it Possible.
25 years after the term “light pollution” was coined, we still have a hard time understanding what it is. Measuring it is difficult and metrics to describe it are still being developed. Innovative techniques like all-sky imaging and high dynamic range photography are finally making it possible to accurately measure night sky brightness and glare. International Space Station and satellite imagery is also being used to measure global sky brightness and document trends in its proliferation. This session will demonstrate how to measure different aspects of light pollution and examine the metrics that have been developed to quantify it.
Presented by: Bob Parks
Smart Outdoor Lighting Alliance
Pawan kumar sharma MSc Interior Design ( Lighting Project)
This document provides information on lighting design for commercial and residential spaces. It discusses key lighting principles and terms such as foot candles, lux, color temperature, and color rendering index. It also describes different light sources like incandescent lamps, types of lighting fixtures and luminaires, and how to classify luminaires. Recommended light levels for various activities are provided.
Lightning (outdoor and specialized )
Metal halide lamps are commonly used in outdoor lighting such as streetlights, parking lots, and stadiums. They produce very bright white light and have good color rendition. Floodlights are high intensity lights often used to illuminate outdoor sports fields at night. Landscape lighting is used to showcase plants and architectural features. Common types include low voltage halide spotlights, well lights, and linear path lights. Photocells and timers automatically control lighting based on time of day or darkness to save energy. Specialized lighting can enhance landscapes, pools, and outdoor displays through directional and diffuse lighting designs.
Light pollution ppt.pptx
This document discusses light pollution, which refers to excessive and inappropriate artificial light that negatively impacts the environment. It defines different types of light pollution like sky glow, glare, light trespass, and overlighting. Causes are discussed like lack of shielding, timing controls, and improper fixture selection. Effects are on fauna like disrupting bird and insect behaviors, and on flora by interfering with nocturnal pollination and increasing algal blooms. In conclusion, artificial light at night disrupts natural darkness needed for rest and biological rhythms of both humans and other organisms.
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ILP CPD webinar: How to eliminate light pollution - How we can mitigate light...
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Measuring Light Pollution - How New Technology is Making it Possible.
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Daylight harvesting utilizes natural daylight to reduce energy usage from electric lighting. It delivers daylight into buildings through windows, skylights, or light shelves and controls it using methods like occupancy sensors, photosensors, or dimming systems. Daylight harvesting systems interact with electric lighting by dimming or turning off lights when sufficient daylight is available and turning lights on or brightening them when daylight levels decrease.
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This document provides an overview of different lighting sources for an electrical breakfast club meeting. It discusses the history of lighting from ancient Egyptians using hollowed stones and plant fibers as the first light sources up to modern LED lighting. The types of light sources covered include incandescent, fluorescent, high intensity discharge (HID), and light emitting diodes (LEDs). For each type, the document describes the basic components and operation, and lists the pros and cons. It also briefly mentions some major lamp manufacturers.
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This document discusses sustainability and quality lighting design. It defines sustainability as meeting present needs without compromising future generations' ability to meet their own needs. Sustainable design components include low energy use, renewable energy sources, recycled/recyclable materials, local materials, and responsible site selection. Quality lighting has three components - economics, human needs, and architecture. Some conflicts designers face include dark sky ordinances, color rendering, high lighting requirements, energy limitations, and balancing client and code requirements.
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Daylight harvesting utilizes natural daylight to reduce energy usage from electric lighting. It delivers daylight into buildings through windows, skylights, or light shelves and controls it using methods like occupancy sensors, photosensors, or dimming systems. Daylight harvesting systems interact with electric lighting so lights can be dimmed or turned off when sufficient daylight is present and turned on when daylight levels drop to supplement the interior lighting needs.
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Daylight harvesting utilizes natural light to reduce energy usage from electric lighting. It delivers daylight into buildings through windows, skylights, or light shelves and controls it using methods like occupancy sensors, photosensors, or dimming systems. Daylight harvesting systems interact with electric lighting so that artificial lights turn on or dim based on available natural light levels to optimize energy savings while providing adequate illumination.
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The document discusses NFPA 72 and NFPA 101, which provide minimum requirements for fire alarm systems and life safety from fire. NFPA 72 defines signal initiation, transmission, notification and annunciation for fire alarm systems to provide notification, summon aid and control safety functions. NFPA 101 aims to protect occupants not involved in initial fire development and improve survivability for those who are. It establishes requirements for visible signaling, including candela ratings and placement of strobes in corridors and sleeping areas. Synchronization of multiple appliances is also addressed.
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Light trespass and_pollution[1]
- 1. Electrical Breakfast Club 03/14/08 Light Trespass & Light Pollution
- 2. INTRODUCTION There is an increasing concern for the problems created by unwanted light at night. Lighting designers are faced with conflicting challenges Meeting Local ordinances controlling the light Meeting the needs of having the light
- 3. PROBLEMS Light Trespass Also known as “obstructive light”, defined as unwanted light that falls beyond the property line or area intended to be illuminated. Results of light trespass Spill Light. Lighting areas beyond the area intended to be lit. Producing illuminance outside of the property lines. Brightness. Bright sources within the observer’s field of view, such as direct viewing of luminaires. Discomfort glare Disability glare – Reduction in the visibility of significant visual tasks
- 4. PROBLEMS Who does light trespass having the largest negative impact on? Neighborhood residents Unwanted light shining into homes at night Desire to have a low level of ambient light Drivers Disability glare can seriously affect a driver’s visibility and ability to locate and recognize signal lights.
- 5. PROBLEMS Biggest Offenders Street lights with inadequate optical control Sports field lighting Commercial lighting Biggest Reasons Excessive and unnecessary use of lamps with light lumen output Incandescent floodlights improperly aimed Luminaires left on all dusk to dawn for no real purpose
- 6. PROBLEMS Light Pollution Also known as “sky glow”, defined as light that is directed upward to the sky or reflected from surfaces that is interference. Results of light pollution Natural and manmade particles in the air scatter light rays from outdoor lighting and create an artificial fog in the sky. General Public Astronomy
- 7. PROBLEMS Even light from well-designed lighting systems will reflect from objects being illuminated and light will enter the atmosphere. Almost impossible to eliminate all light from entering the atmosphere.
- 8. ENVIRONMENTAL AFFECTS Environmental Sea Turtles Affects Illuminated beaches Birds Nighttime illuminance confusion Death spiral
- 9. SOLUTIONS Luminaires that allow for control of light above the horizontal plane. Semi-cut-off Cut-off Full cut-off Luminaire shields Reduce amount of light on highly reflective surfaces. Review lighting systems
- 10. LEED Light Pollution Reduction Credit Must provide cut sheets of all luminaires along with a plan showing horizontal and vertical footcandles. Projects attaining this credit saw an average of 30% electricity savings due to elimination of luminaires and reduction in lumens.
- 11. EXAMPLES
- 12. EXAMPLES
- 13. EXAMPLES