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		<id>https://www.designingbuildings.co.uk/w/index.php?action=history&amp;feed=atom&amp;title=Photoelectric_controls</id>
		<title>Photoelectric controls - Revision history</title>
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		<updated>2026-04-05T17:18:46Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
		<generator>MediaWiki 1.17.4</generator>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Photoelectric_controls&amp;diff=259476&amp;oldid=prev</id>
		<title>Designing Buildings at 09:26, 8 August 2023</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Photoelectric_controls&amp;diff=259476&amp;oldid=prev"/>
				<updated>2023-08-08T09:26:05Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
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		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 09:26, 8 August 2023&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[https://www.bsria.com/uk/product/DJLLPr/guide_to_controls_bg832023_a15d25e1/ Guide to Controls (BG 83/2023)] written by John Marrow and published by BSRIA in June 2023, states: ‘Photoelectric controls ensure the lighting is switched on or off or dimmed in response to levels of natural light. Light levels are measured using one or more photoelectric sensors. This application is also known as daylight harvesting. If daylight is available to the workspace to be illuminated then energy consumption can be reduced by dimming or turning off luminaires.’&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[https://www.bsria.com/uk/product/DJLLPr/guide_to_controls_bg832023_a15d25e1/ Guide to Controls (BG 83/2023)] written by John Marrow and published by BSRIA in June 2023, &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;defines photoelectric control as: ‘A control strategy which adjusts electric lighting levels according to availability of natural light.’&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;It &lt;/ins&gt;states: ‘Photoelectric controls ensure the lighting is switched on or off or dimmed in response to levels of natural light. Light levels are measured using one or more photoelectric sensors. This application is also known as daylight harvesting. If daylight is available to the workspace to be illuminated then energy consumption can be reduced by dimming or turning off luminaires.’&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;--[[User:BSRIA|BSRIA]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;--[[User:BSRIA|BSRIA]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Designing Buildings</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Photoelectric_controls&amp;diff=259474&amp;oldid=prev</id>
		<title>Designing Buildings: Created page with &quot;[https://www.bsria.com/uk/product/DJLLPr/guide_to_controls_bg832023_a15d25e1/ Guide to Controls (BG 83/2023)] written by John Marrow and published by BSRIA in June 2023, states: ...&quot;</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Photoelectric_controls&amp;diff=259474&amp;oldid=prev"/>
				<updated>2023-08-08T09:24:15Z</updated>
		
		<summary type="html">&lt;p&gt;Created page with &amp;quot;[https://www.bsria.com/uk/product/DJLLPr/guide_to_controls_bg832023_a15d25e1/ Guide to Controls (BG 83/2023)] written by John Marrow and published by BSRIA in June 2023, states: ...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;[https://www.bsria.com/uk/product/DJLLPr/guide_to_controls_bg832023_a15d25e1/ Guide to Controls (BG 83/2023)] written by John Marrow and published by BSRIA in June 2023, states: ‘Photoelectric controls ensure the lighting is switched on or off or dimmed in response to levels of natural light. Light levels are measured using one or more photoelectric sensors. This application is also known as daylight harvesting. If daylight is available to the workspace to be illuminated then energy consumption can be reduced by dimming or turning off luminaires.’&lt;br /&gt;
&lt;br /&gt;
--[[User:BSRIA|BSRIA]]&lt;br /&gt;
&lt;br /&gt;
= Related articles on Designing Buildings =&lt;br /&gt;
&lt;br /&gt;
* BSRIA articles.&lt;br /&gt;
* BSRIA definitions.&lt;br /&gt;
* BSRIA Guide to Controls BG83/2023.&lt;br /&gt;
* Building management systems.&lt;br /&gt;
* Building services.&lt;br /&gt;
* Control.&lt;br /&gt;
* Colour changing controls.&lt;br /&gt;
* Lighting.&lt;br /&gt;
* Smart buildings.&lt;br /&gt;
&lt;br /&gt;
[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:Definitions]] [[Category:Products_/_components]]&lt;/div&gt;</summary>
		<author><name>Designing Buildings</name></author>	</entry>

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