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Redesign of Lighting Fixtures for the Texas Department of Corrections
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Date
1988
Journal Title
Journal ISSN
Volume Title
Publisher
Energy Systems Laboratory (http://esl.tamu.edu), Texas A&M University
Department of Mechanical Engineering, Texas A&M University
Department of Mechanical Engineering, Texas A&M University
Abstract
Over 100 tests of potential design modifications for the cell light
fixtures used by the Texas Department of Corrections have been
conducted. As a result of these tests, the following recommendations
are made:
1. Turn diffuser material so prisms face cell.
2. Enlarge diffuser opening to 16 by 46 inches.
3. Replace 1/2-inch hardware cloth by #3 stainless cane weave
with 2-inch mesh, painted white.
4. Replace ballasts with Advance R-2S40-TP Mark III or
equivalent.
5. Replace blankets with light colored blankets.
6a. Use fixture with four 34 watt tubes if no allowance for
fixture degradation is deemed acceptable;
6b. Use fixture with three 40 watt high efficiency tubes and
reflector if 10%-15% margin above 20 fc is needed;
6c. Use fixture with four high efficiency tubes if 20% margin
above 20 fc is considered necessary.
Description
Implementation of these recommendations will result in reduced
construction cost of $91,418 and annual operating savings of $88,910 if
recommendations 1-5 and 6a are implemented at Amarillo and Gatesville.
Use of recommendations 1-5 and 6b will increase first cost by $22,592,
but annual operating savings also increase to $98,928 while 6c would
provide first cost savings of $67,606 and operating savings of $73,882
annually.
Additional maintenance savings will be realized in each case since
the fixtures recommended above use tubes with 20,000 - 24,000 hour
operating lifetimes instead of the 12,000 hours of the base case tubes.
Keywords
Texas Department of Corrections