Page 77 - GRIHA Manual Volume II - Introduction to National Rating System
P. 77
Sustainable site planning 69
CRIteRIon 6
enHAnCe outdooR – lIGHtInG SySteM
effICIenCy And uSe RenewAble
eneRGy SySteM foR MeetInG
outdooR lIGHtInG RequIReMentS
Introduction
Primary use of outdoor lighting is during night time to illuminate outdoor areas for improved
visibility, security, and aesthetics. Lighting levels lower or higher than the optimum level reduce
visibility and are unable to serve the purpose. Therefore, it is important to design outdoor lighting
such that it provides required illumination levels during night.
Usually people relate quantity of light to safety; however, it is not the quantity but the quality of
light that gives rise to the feeling of safety and security. In fact, excessive illumination or light that
is not focused properly causes glare or high-brightness contrast, which results in loss of visibility.
Prevalent notion of ‘the brighter the better’ and general insensitivity of people towards energy
wastage often results in high energy-consuming outdoor lighting schemes with illumination levels
that are much higher than what is necessary. Poor maintenance and operation are other major
factors contributing towards energy inefficiency in outdoor lighting. Outdoor light switched on
during daytime is a common sighting in urban areas.
An efficient outdoor lighting scheme meets the desired level of lighting, but also with optimum
utilization of energy.
Inappropriate design, use of inefficient lamps and poor operation of outdoor lighting not only
result in wastage of light and poor illumination quality, but also contribute to high electricity
consumption. This in turn contributes to high levels of greenhouse gas emissions and increased
operating cost.
Solutions
The above-mentioned problems can be addressed by using a two-fold strategy of first reducing the
overall outdoor lighting load through optimum design and use of energy efficient external light
sources, and then using renewable energy sources to meet the reduced outdoor electricity demand.
Energy eficiency in outdoor lighting
Efficiency of external lighting scheme can be improved through optimum design, use of efficient
light sources, and by installing automatic lighting controls.
Outdoor lighting design
Lighting techniques
Outdoor lighting covers a wide range of applications, including parking areas, pathways, walkways,
parks, landscaped areas, water bodies, sculptures, and building facades.
CRIteRIon 6
enHAnCe outdooR – lIGHtInG SySteM
effICIenCy And uSe RenewAble
eneRGy SySteM foR MeetInG
outdooR lIGHtInG RequIReMentS
Introduction
Primary use of outdoor lighting is during night time to illuminate outdoor areas for improved
visibility, security, and aesthetics. Lighting levels lower or higher than the optimum level reduce
visibility and are unable to serve the purpose. Therefore, it is important to design outdoor lighting
such that it provides required illumination levels during night.
Usually people relate quantity of light to safety; however, it is not the quantity but the quality of
light that gives rise to the feeling of safety and security. In fact, excessive illumination or light that
is not focused properly causes glare or high-brightness contrast, which results in loss of visibility.
Prevalent notion of ‘the brighter the better’ and general insensitivity of people towards energy
wastage often results in high energy-consuming outdoor lighting schemes with illumination levels
that are much higher than what is necessary. Poor maintenance and operation are other major
factors contributing towards energy inefficiency in outdoor lighting. Outdoor light switched on
during daytime is a common sighting in urban areas.
An efficient outdoor lighting scheme meets the desired level of lighting, but also with optimum
utilization of energy.
Inappropriate design, use of inefficient lamps and poor operation of outdoor lighting not only
result in wastage of light and poor illumination quality, but also contribute to high electricity
consumption. This in turn contributes to high levels of greenhouse gas emissions and increased
operating cost.
Solutions
The above-mentioned problems can be addressed by using a two-fold strategy of first reducing the
overall outdoor lighting load through optimum design and use of energy efficient external light
sources, and then using renewable energy sources to meet the reduced outdoor electricity demand.
Energy eficiency in outdoor lighting
Efficiency of external lighting scheme can be improved through optimum design, use of efficient
light sources, and by installing automatic lighting controls.
Outdoor lighting design
Lighting techniques
Outdoor lighting covers a wide range of applications, including parking areas, pathways, walkways,
parks, landscaped areas, water bodies, sculptures, and building facades.
