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Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Desig Cathedral of Christ the Light

Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

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Page 1: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Sustainable Lighting Strategies

Specialization in Environmental Architecture 1: Green Design

Cathedral of Christ the Light

Page 2: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Energy Use• In homes and offices from 20 to 50 percent of

total energy consumed is due to lighting.• Lighting accounts for 20 percent of all electrical

energy usage.• Lighting accounts for about five to ten percent

of total energy use

Page 3: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Sustainable Lighting

• The approach to sustainable energy use is a two pronged:

1. Energy Conservation2. Energy Efficiency

It can be described as minimizing energy consumption and carbon emissions while still maintaining suitable illumination on an economically satisfactory basis.

Page 4: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Daylighting

Page 5: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Daylighting In Architecture

• Is the practice of placing windows or other openings and reflective surfaces so that during the day natural light provides effective internal lighting.

• Most simply, daylighting is the practice of using natural light to illuminate building spaces.

Barcelona Museum of Contemporary Art (Architect: Richard Meier)

Page 6: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Natural Lighting Benefits

• Reduced energy consumption.• Reduction of mildew or mold

built-up.• Healthy dose of vitamin D.• Improved performance due to

change in working environment.• Increased visual appeal in

interiors.

Kimball Art Museum

The Pantheon

Page 7: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Daylighting Strategies• Sidelightingis a daylighting strategy that uses apertures located in the wall planes as the point of admission for ambient daylight.

• Toplightingis a daylighting strategy that uses apertures located at the roof plane as the point of admission for ambient daylight.

Page 8: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Strategies and Tools

3 ways to improve the amount of light available from a window.• Place window close to a light

colored wall.• Slant the sides of window

openings so the inner opening is larger than the outer opening.

• Use a large light colored window sill to project light into the room.

• Daylighting Windows / Clerestories

Page 9: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Strategies and Tools

• Light Shelves

An effective way to enhance the lighting from windows on the equator-facing side of a structure.

The light shelf projects beyond the shadow created by the eave and reflects sunlight upward to illuminate the ceiling.

12” minimum width

Are used to more evenly distribute daylight entering a building through sidelighting apertures

Page 10: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Strategies and Tools

• Skylightis any horizontal window, roof lantern or oculus, placed at the roof of the building, often used for daylighting.• The optimal area of skylights varies according to

climate, latitude, and the characteristics of the skylight.

• It is usually 4-8% of floor area.• Spacing of skylights are usually equal to the ceiling

height.

Reichstag

Page 11: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Strategies and Tools

• Light Tube

Also called a solar tube, solar pipes, light pipes.

A devices consisting of a lens that isinstalled on the roof, an adjustable mirror-lined tube (10- 20” diameter)

It is placed into a roof and admits light to a focused area of the interior.

Page 12: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Strategies and Tools• The Thinner the Building, the Better.

Maximize ceiling and window height to gain better light distribution

Separate Daylighting and View Windows.

Bring Daylight in from above to obtain deeper penetration into space.

Page 13: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Strategies and Tools

• Maximize North and South Faces• Minimize East and West Faces

A southern facing orientation is optimal if a building or system is located in the northern hemisphere, and a northern facing orientation is optimal if located in the southern hemisphere.

Page 14: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Strategies and Tools

• Reduce the surface area of GlassToo much glass could end up with heat-gain and heat-loss problems, and glare issues.

Filter and shade daylight to avoid direct sun and sky light

Page 15: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Strategies and Tools

• Open up the Plan• Limit Private Rooms /

Spaces

Page 16: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Strategies and Tools

• Pick Light Colors with High Reflectance Coefficient

Bounce daylight off surrounding surfaces to diffuse light in more even patterns

Page 17: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Artificial Lighting

Page 18: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Assessing a Sustainable Lighting Program

1. Lighting Technology• Lamps• Fittings and Luminaires

Fluorescent TubeCompact Fluorescent Lamp LED Lamp

Page 19: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Assessing a Sustainable Lighting Program

2. Lighting Design• Colors of Wall and Ceiling• Lighting Layout• Lighting Control

Page 20: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

• Avoiding incandescent lights, using CFLs or light-emitting diode.• The color of the walls, ceilings and furnishings should be kept light

so that it reflects more light to the workspace areas.• Reducing the general illumination level by employing task lighting.• Using dimming or step ballasts for energy savings when full light

level is not required.• Matching the amount and quality of light to the function to be

performed.• Switching lighting for perimeter zones to be separate from interior

zones.• Energy consumption can also be reduced through sophisticated

lighting control systems.• Specifying higher efficiency light sources to produce more light

with lower energy consumption.• Consider solar powered lighting.

Efficient Lighting Design Approaches

Page 21: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

Assessing a Sustainable Lighting Program

3. Practices: Organizational BehaviorIt is essential to engage with and educate users on the need for the change and the benefits of sustainable lighting systems.

• Educating and training of users to gain commitment to the lighting project.• Automatic shutdown of lights after 6 or 7 pm, beyond which local task lights can be

used.• Negotiating cleaning contracts for day time, so that all lights can be switched off

after office hours.• Reinvigorating any existing campaigns supporting good practices in lighting.• Integrating sustainable lighting strategies into the company’s procurement policies

and practices.• Switching to green power to meet an organization’s energy needs.• Offsetting lowered emissions through carbon credits and other alternative

arrangements.

Page 22: Sustainable Lighting Strategies Specialization in Environmental Architecture 1: Green Design Cathedral of Christ the Light

References