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.

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T5 and T5HO fluorescent high bay fixtures and other T5-based specialty lights are built around a linear fluorescent tube lamp.  Like other types of lamps, the number in the name of the lamp reflects its size.  The “T5” name reflects the diameter of the tube in eighths of an inch.  A T5 lamp is five-eighths of an inch (5/8”).  Similarly, a T8 lamp is eight-eighths (or one inch) in diameter and a T12 is 12 eighths (or 1-1/2 inches) in diameter.  One of the features that make a T5 bulb and T5-based high bay light fixtures more efficient is the fact that the lamp is 37% narrower tube than a T8 and over 55% narrower than a T12 lamp.

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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.

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Did you know that you may be eligible for a substantial tax deduction of up to $1.80 per square foot for improving the energy efficiency of your building or designing energy efficiency into your new building?  If you’re already thinking of a retrofit project, this can significantly improve your Return on Investment.

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