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Building Day Lighting

    Table of contents

    Opportunity

    Facilities meeting one or more of the following criteria may benefit from this opportunity.

    • Local climate provides year-round light
    • High levels of light are needed indoors during the day

     

    Background

    Light transmitting panels typically allow more than 85% of the sunlight that is incident to the panels to be transmitted into the building.  The lumens per square foot of work space using sunlight will exceed the amount of lumens currently available using electric lighting part of the day reducing associated lighting costs.  Data for mostly cloudy days in the area is used to determine the minimum amount of expected sunlight. Actual available sunlight will often be greater.

     

    Templates

    These templates are excel based spreadsheets that quickly and easily help users quantify energy savings, cost savings, implementation costs, and payback.  The excel spreadsheets then automatically write a professional looking report for users to utilize as they see fit.

     

    Examples

    Following is an example of a recommendation prepared with this tool:

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    Viewing 2 of 2 comments: view all
    http://www.nrel.gov/docs/legosti/old/7904.pdf
    Posted 13:21, 5 Jul 2012
    Updated to style 2015 - Incentives & export
    Posted 17:22, 1 Sep 2015
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