800-852-6832 | 5010 River Rd. Mt. Bethel, PA 18343

800-852-6832 | 5010 River Rd. Mt. Bethel, PA 18343

Light Reflectivity Cost Savings
Technical Bulletin No. 16

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CASE STUDY:

Lamtec White Facings Reduce Lighting Investment Cost and Annual Electricity Costs

Objective:

Compare the lighting fixture requirements and energy costs using Lamtec white metal building facings versus a conventional galvanized metal roof deck.

Project:

Two (2) industrial facilities totaling 420,000 ft2, completed in 2010

  • Building 1: 260,000ft2 faced with WMP-50 in the roof
  • Building 2: 160,000ft2 faced with WMP-UV HD in the roof

Interior precast walls painted with eggshell off white finish

Specifications:

  • Approximately 30 foot candles maintained illumination T5HO high bay 6 lamp 324 watt wide distribution fluorescent light fixtures with up-lighting.
  • Ceiling height varies between 25 and 32 feet
  • Lighting installed at 22 ft. above finished floor

Light

WMP-50 and WMP-UV HD light reflectance is 85%*

Reflectance:

The plain galvanized metal roof deck light reflectance is 62%**

Summary:

Slide left or right to view full table data.

Sample Building Fixture Count
Plain Galvanized		 Fixture Count
Lamtec White Facing		 Fixture Reduction kW Reduction Annual Savings
Building 1:
260,000 ft2		 544 434 110 42.27 $28,994
Building 2:
160,000 ft2		 322 264 58 22.27 $15,228

Calculations Based On:

  • Hours of operation/year = (260 days/year)*(24 hours/day) = 6240 hours/year
  • Electricity Cost = $.11/kW hour

*The light reflectance of Lamtec facings is provided on the specification sheets available at www.lamtec.com

**Light reflectance determined in testing by Atlas Services Group on May 3rd, 2011.

Conclusions:

  • Lamtec facings reduced the number of lighting fixtures required by 20% in Building # 1 and 18% in Building #2; reducing the total investment cost in lighting fixtures.
  • Lamtec facings reduced the annual lighting cost by $28,994/year in Building #1 and $15,288/year in Building #2.
  • Lamtec facings offer exceptional benefits for their outstanding light reflectivity when compared to a plain galvanized metal roof deck.
  • As with any project, Lamtec recommends consulting your design engineer for your specific design criteria and lighting calculations.