Archive for December 2009

We’re often asked how 4-lamp and 6-lamp T5HO High Bays fare when compared with traditional 400W Metal Halide fixtures.  The chart below compares 4-lamp and 6-lamp T5 fixtures against a traditional 400W Metal Halide High Bay along a number of dimensions.  The comparison dimensions are listed below with a short description of each.

Read the rest of this entry »

One of the most common questions that facility and operation managers ask is “How much light do I need to properly illuminate my facility?”

Since 1958, the Illuminating Engineering Society has been publishing recommended illuminance levels for a multitude of tasks and facility types in table form.  The published tables provide guidance for both generic tasks and hundreds of very specific tasks.  In order to understand these tables, it’s best to start with an overview of how light is measured.

This article gives a brief explanation of how light is measured and provides a handy table that can be used to determine how much light is needed in various types of facilities. If after reading this, you have any questions about the quantity of light you should plan for in your lighting retrofit project, don’t hesitate to contact us.

Read the rest of this entry »

For many that keep track of the global climate debate, the next 12 days is about as exciting as it gets.  That’s because from December 7th through the 18th,  193 of the world’s nations will have their top climate and environmental ministers in Copenhagen for the 15th annual Conference of the Parties (or COP15) of the United Nations Climate Change Convention.  The goal for this year’s conference is to establish an ambitious global climate agreement that can take the place of the expiring Kyoto Protocol.