Light shelf - Revision history

Designing Buildings at 09:37, 2 October 2020

2020-10-02T09:37:27Z

← Older revision		Revision as of 09:37, 2 October 2020
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	* Window.		* Window.

−	[[Category:Health_and_safety_/_CDM]] [[Category:Sustainability]] [[Category:Design]] [[Category:Products_/_components~~]] [[Category:DCN_Product_Knowledge~~]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Health_and_safety_/_CDM]] [[Category:Sustainability]] [[Category:Design]] [[Category:Products_/_components]]

92.6.49.118 at 19:01, 20 February 2020

2020-02-20T19:01:52Z

← Older revision		Revision as of 19:01, 20 February 2020
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	[[File:Lightshelf.jpg\|link=File:Lightshelf.jpg]]		[[File:Lightshelf.jpg\|link=File:Lightshelf.jpg]]

−	A light shelf is a passive architectural device used to reflect natural daylight into a building. 'Bouncing' sunlight off a horizontal surface distributes it more evenly and deeply within a space, whereas direct sunlight can cause glare near an opening, whilst leaving dark areas further in. ~~yes thats right~~	+	A light shelf is a passive architectural device used to reflect natural daylight into a building. 'Bouncing' sunlight off a horizontal surface distributes it more evenly and deeply within a space, whereas direct sunlight can cause glare near an opening, whilst leaving dark areas further in.

	Light shelves can be fixed either externally, internally or both (which often works best in providing an even illumination gradient). They are often designed as part of a broader daylight and shading strategy.		Light shelves can be fixed either externally, internally or both (which often works best in providing an even illumination gradient). They are often designed as part of a broader daylight and shading strategy.
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	* Window.		* Window.

−	[[Category:Health_and_safety_/_CDM]] [[Category:Sustainability]] [[Category:Design]] [[Category:Products_/_components]]	+	[[Category:Health_and_safety_/_CDM]] [[Category:Sustainability]] [[Category:Design]] [[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

92.6.49.118 at 19:01, 20 February 2020

2020-02-20T19:01:28Z

← Older revision		Revision as of 19:01, 20 February 2020
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	[[File:Lightshelf.jpg\|link=File:Lightshelf.jpg]]		[[File:Lightshelf.jpg\|link=File:Lightshelf.jpg]]

−	A light shelf is a passive architectural device used to reflect natural daylight into a building. 'Bouncing' sunlight off a horizontal surface distributes it more evenly and deeply within a space, whereas direct sunlight can cause glare near an opening, whilst leaving dark areas further in.	+	A light shelf is a passive architectural device used to reflect natural daylight into a building. 'Bouncing' sunlight off a horizontal surface distributes it more evenly and deeply within a space, whereas direct sunlight can cause glare near an opening, whilst leaving dark areas further in. yes thats right

	Light shelves can be fixed either externally, internally or both (which often works best in providing an even illumination gradient). They are often designed as part of a broader daylight and shading strategy.		Light shelves can be fixed either externally, internally or both (which often works best in providing an even illumination gradient). They are often designed as part of a broader daylight and shading strategy.

Designing Buildings at 07:40, 23 December 2019

2019-12-23T07:40:19Z

← Older revision		Revision as of 07:40, 23 December 2019
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	Alternative solutions to light shelves include the use of blinds and louvre window systems!		Alternative solutions to light shelves include the use of blinds and louvre window systems!

−	~~= Find out more =~~	+	= Related articles on Designing Buildings Wiki =
−		+
−	=== Related articles on Designing Buildings Wiki ===	+

	* Daylight lighting systems.		* Daylight lighting systems.
	* Health and wellbeing impacts of natural and artificial lighting.		* Health and wellbeing impacts of natural and artificial lighting.
−	* ~~Overheating~~.	+	* Lighting.
−	* ~~Preventing overheating~~.	+	* Light well.
	* Shading coefficient for buildings.		* Shading coefficient for buildings.
	* Smart office lighting.		* Smart office lighting.
	* The daylight factor.		* The daylight factor.
−	* Thermal comfort.
	* Use of lighting to improve health and wellbeing.		* Use of lighting to improve health and wellbeing.
		+	* Velux window.
		+	* Window.

	[[Category:Health_and_safety_/_CDM]] [[Category:Sustainability]] [[Category:Design]] [[Category:Products_/_components]]		[[Category:Health_and_safety_/_CDM]] [[Category:Sustainability]] [[Category:Design]] [[Category:Products_/_components]]

117.196.107.243 at 08:52, 1 October 2019

2019-10-01T08:52:35Z

← Older revision		Revision as of 08:52, 1 October 2019
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	* They Increase maintenance requirements.		* They Increase maintenance requirements.

−	Alternative solutions to light shelves include the use of blinds and louvre window systems.	+	Alternative solutions to light shelves include the use of blinds and louvre window systems!

	= Find out more =		= Find out more =

81.140.196.158 at 10:01, 21 June 2017

2017-06-21T10:01:18Z

← Older revision		Revision as of 10:01, 21 June 2017
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	[[File:Lightshelf.jpg\|link=File:Lightshelf.jpg]]		[[File:Lightshelf.jpg\|link=File:Lightshelf.jpg]]

−	A light shelf is a passive architectural device ~~that is~~ used to reflect daylight into a building. ~~By bouncing~~ sunlight off ~~of surfaces, light can be distributed~~ more evenly, whereas direct sunlight ~~often causes~~ glare~~. By placing light shelves above eye-level~~, ~~they work to both shade view windows and bounce light upward onto the ceiling and deeper into the space~~.	+	A light shelf is a passive architectural device used to reflect natural daylight into a building. 'Bouncing' sunlight off a horizontal surface distributes it more evenly and deeply within a space, whereas direct sunlight can cause glare near an opening, whilst leaving dark areas further in.

−	Light shelves ~~are typically used on high- and low-rise office buildings, as well as public buildings, and~~ can be fixed either externally, internally or ~~combined~~ (which often works best in providing an even illumination gradient). They are often designed as part of a broader daylight strategy.	+	Light shelves can be fixed either externally, internally or both (which often works best in providing an even illumination gradient). They are often designed as part of a broader daylight and shading strategy.

−	They are generally ~~designed to be~~ on walls facing the sun~~, where maximum sunlight is found~~, as on pole-facing walls ~~they~~ tend to act only as sunshades. On east and west orientations, they may act as an effective means of reducing direct heat gain and glare but will not bounce light ~~very~~ deeply into the ~~spaces required~~.	+	They are generally found on walls facing the sun, as on 'pole-facing walls' would tend to act only as sunshades. On east and west orientations, they may act as an effective means of reducing direct heat gain and glare but will not bounce light as deeply into the space.

−	~~An exterior~~ light ~~shelf is often thought of~~ as ~~preferable in order to reduce cooling loads and solar gain. They~~ do not ~~change the incoming light to~~ heat ~~ratio, but allow a better distribution light which~~ can help ~~with~~ cooling.	+	Exterior light shelves can be more effective than internal light shelves as they do not radiate as much heat into the space and so can help reduce solar heat gain and cooling loads.

−	An internal light ~~shelf tends~~ to ~~follow~~ a ~~rule that its~~ depth ~~should be approximately equal~~ to the height of the ~~clerestory window head above the shelf~~.	+	Internal light shelves however may be easier to maintain as they can be more accessible and less exposed. In very broad terms, internal light shelves tend to have a depth similar to the height of the opening that they sit below.

−	~~Several different materials can be used to construct light~~ shelves~~, including~~ timber, glass, ~~plastic~~, metal panels, ~~acoustic ceiling materials~~, and so on. The choice of material ~~is often~~ determined by considerations regarding the structural strength, ease of maintenance, cost, ~~aesthetics, etc~~. Opacity is not essential, ~~since~~ transparency can help ~~with even light distribution without significantly reducing the amount of~~ light.	+	Light shelves are commonly made from; timber, glass, plastics, metal panels, plaster, acoustic panels and so on. The choice of material may be determined by considerations regarding the design of the rest of the building, structural strength, ease of maintenance, cost, durability and so on. Opacity is not essential, as some transparency can help more-evenly distribute light.

−	~~Whichever material is used, the light shelf should be a lightweight installation.~~ To be able to reflect light up to the ceiling, the upper surface should be matte white or diffusely specular, ~~but should~~ not be shiny or reflective~~. Whereas, the lower surface should be aesthetically suited to the interior design of the room as this is the part which will be visible to occupants~~. Ideally, the ceiling ~~surface~~ should be a light colour.	+	To be able to reflect light up to the ceiling, the upper surface of light shelves should be matte white or diffusely specular, it does not need to be shiny or reflective. Ideally, the ceiling should also be a light colour.

−	~~Some of the advantages of light~~ shelves ~~are as follows~~:	+	Light shelves can:

	* Enhance daylight quality.		* Enhance daylight quality.
−	* ~~Can reduce~~ the need for artificial lighting and so ~~reduces~~ energy consumption.	+	* Reduce the need for artificial lighting and so reduce energy consumption.
−	* ~~Advanced light shelf technology is capable of increasing daylight penetration distance of up to 4 times the distance between floor and top of the window~~.	+	* Reduce cooling loads.
−	* ~~They have been proven to increase~~ occupant comfort and productivity.	+	* Increase occupant comfort and productivity.
−	* ~~Are often demountable so the components can be re-used or recycled~~.	+	* Enhance design aesthetics.

	Some of the limitations or drawbacks of light shelves are as follows:		Some of the limitations or drawbacks of light shelves are as follows:

−	* ~~May not~~ be ~~suitable for all climates. Tend~~ to ~~be used in~~ mild rather than tropical or desert climates.	+	* They tend to be best-suited to mild rather than tropical or desert climates.
−	* ~~Can~~ interfere with the installation of sprinkler systems~~. E.g. in Canada, light shelves cannot exceed 4 ft (1.2 m) in width or the design will need to be integrated with the sprinkler system~~.	+	* They can interfere with the installation of sprinkler systems.
−	* ~~In order to be effective, they~~ require a floor-to-ceiling height ~~of around 3 m, which is often higher than average~~.	+	* They may require a higher floor-to-ceiling height.
−	* Their design must be coordinated with ~~window coverings~~.	+	* Their design must be coordinated with windows.
−	* ~~Increased~~ maintenance requirements.	+	* They Increase maintenance requirements.

	Alternative solutions to light shelves include the use of blinds and louvre window systems.		Alternative solutions to light shelves include the use of blinds and louvre window systems.

Editor at 16:16, 20 June 2017

2017-06-20T16:16:34Z

← Older revision		Revision as of 16:16, 20 June 2017
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−	[[File:Lightshelf.jpg]]	+	[[File:Lightshelf.jpg\|link=File:Lightshelf.jpg]]

	A light shelf is a passive architectural device that is used to reflect daylight into a building. By bouncing sunlight off of surfaces, light can be distributed more evenly, whereas direct sunlight often causes glare. By placing light shelves above eye-level, they work to both shade view windows and bounce light upward onto the ceiling and deeper into the space.		A light shelf is a passive architectural device that is used to reflect daylight into a building. By bouncing sunlight off of surfaces, light can be distributed more evenly, whereas direct sunlight often causes glare. By placing light shelves above eye-level, they work to both shade view windows and bounce light upward onto the ceiling and deeper into the space.
Line 41:		Line 41:
	* Overheating.		* Overheating.
	* Preventing overheating.		* Preventing overheating.
		+	* Shading coefficient for buildings.
	* Smart office lighting.		* Smart office lighting.
	* The daylight factor.		* The daylight factor.

Editor: Created page with "File:Lightshelf.jpg A light shelf is a passive architectural device that is used to reflect daylight into a building. By bouncing sunlight off of surfaces, light can be dist..."

2017-06-20T16:13:09Z

Created page with "File:Lightshelf.jpg A light shelf is a passive architectural device that is used to reflect daylight into a building. By bouncing sunlight off of surfaces, light can be dist..."

New page

[[File:Lightshelf.jpg]]

A light shelf is a passive architectural device that is used to reflect daylight into a building. By bouncing sunlight off of surfaces, light can be distributed more evenly, whereas direct sunlight often causes glare. By placing light shelves above eye-level, they work to both shade view windows and bounce light upward onto the ceiling and deeper into the space.

Light shelves are typically used on high- and low-rise office buildings, as well as public buildings, and can be fixed either externally, internally or combined (which often works best in providing an even illumination gradient). They are often designed as part of a broader daylight strategy.

They are generally designed to be on walls facing the sun, where maximum sunlight is found, as on pole-facing walls they tend to act only as sunshades. On east and west orientations, they may act as an effective means of reducing direct heat gain and glare but will not bounce light very deeply into the spaces required.

An exterior light shelf is often thought of as preferable in order to reduce cooling loads and solar gain. They do not change the incoming light to heat ratio, but allow a better distribution light which can help with cooling.

An internal light shelf tends to follow a rule that its depth should be approximately equal to the height of the clerestory window head above the shelf.

Several different materials can be used to construct light shelves, including timber, glass, plastic, metal panels, acoustic ceiling materials, and so on. The choice of material is often determined by considerations regarding the structural strength, ease of maintenance, cost, aesthetics, etc. Opacity is not essential, since transparency can help with even light distribution without significantly reducing the amount of light.

Whichever material is used, the light shelf should be a lightweight installation. To be able to reflect light up to the ceiling, the upper surface should be matte white or diffusely specular, but should not be shiny or reflective. Whereas, the lower surface should be aesthetically suited to the interior design of the room as this is the part which will be visible to occupants. Ideally, the ceiling surface should be a light colour.

Some of the advantages of light shelves are as follows:

* Enhance daylight quality.
* Can reduce the need for artificial lighting and so reduces energy consumption.
* Advanced light shelf technology is capable of increasing daylight penetration distance of up to 4 times the distance between floor and top of the window.
* They have been proven to increase occupant comfort and productivity.
* Are often demountable so the components can be re-used or recycled.

Some of the limitations or drawbacks of light shelves are as follows:

* May not be suitable for all climates. Tend to be used in mild rather than tropical or desert climates.
* Can interfere with the installation of sprinkler systems. E.g. in Canada, light shelves cannot exceed 4 ft (1.2 m) in width or the design will need to be integrated with the sprinkler system.
* In order to be effective, they require a floor-to-ceiling height of around 3 m, which is often higher than average.
* Their design must be coordinated with window coverings.
* Increased maintenance requirements.

Alternative solutions to light shelves include the use of blinds and louvre window systems.

= Find out more =

=== Related articles on Designing Buildings Wiki ===

* Daylight lighting systems.
* Health and wellbeing impacts of natural and artificial lighting.
* Overheating.
* Preventing overheating.
* Smart office lighting.
* The daylight factor.
* Thermal comfort.
* Use of lighting to improve health and wellbeing.

[[Category:Health_and_safety_/_CDM]] [[Category:Sustainability]] [[Category:Design]] [[Category:Products_/_components]]