More Light, Less Cost

1
More Light, Less Cost

• The Lighting Retrofit Program at Sandia National
  Laboratories
• April 2006
• L. Lynnwood Dukes
• Keeping You Brilliant Efficiently

Sandia is a multiprogram laboratory operated by
Sandia Corporation, a Lockheed Martin
Company,for the United States Department of
Energys National Nuclear Security
Administration under contract DE-AC04-94AL85000.
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More Light, Less Cost

• Verification of savings why this topic
• Emergence of SNL-NMs lighting efficiency program
• Good business practice
• Savings to justify the program
• Measurement, reporting
• Specifications and Documentation
• Conclusions

3
Lighting Retrofit Program

• FY1998 Made the case to Management
• Leverage the Group Relamping contract
• Lower lighting costs
• improve lighting quality
• lower HVAC energy costs
• further lower lighting maintenance costs
• Started with a 145,000 sqft office/light lab in
  the summer of 1998 (building 821)

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Building 821 Retrofit

• Retrofit of Building 821
• Three-story office light lab, built in 1980
• Sandia has eight similar buildings
• Had original acrylic-lensed troffers in open-bay
  ceilings cut up by modular walls
• Two ballasts and three F34T12s each
• Convert to one ballast and three F32T8s
• Remove center lamp from fixtures in offices with
  windows

5
Building 821 Criteria

• Take advantage of daylighting in offices
• Insure 50fc in offices, 60fc in labs, and 20fc
  in halls
• Cut the number of components if possible
• Put the light where needed
• Save enough to pay for the work
• Get a warranty on the work

6
Building 821 Results

• Delamped windowed offices by 1/3
• Delamped halls by 1/2, except for E-lights
• Comments from 821s residents
• Seems brighter, better colors, warmer
• Some folks wanted additional delamping
• Cut lighting panels amperage by half (!!)

7
Building 6570 Retrofit

• Retrofit Redesign of Building 6570
• High-bay for impact sled gun, built in 1966
• Built in three sections at three times
• Original bay had 200w incandescents
• Mid bay had 8-foot VHO strips
• New bay has 400w hi-bay HIDs
• Front door no longer near office and shop
• Neither were the light switches
• Spot-relamp calls almost every month ?

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Building 6570 Results

• One HID replaced all the VHOs
• Nine HIDs replaced all the Incandescents
• Added fluorescents to light walkways only
• Added motion sensors to shop and office
• Moved fluorescent switch to front door
• Dont turn on the HIDs if only passing through to
  the office, shop, control room
• All other switches are in areas served

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Savings Tally so far
With about two-thirds of the 6.5 million sqft
campus retrofitted so far (FY2005), we are saving
about 2.2 megawatts/hour for every duty hour the
lights are on or 352k per year. Our budget is
300k, so we are working for free in
FY-06! Further, lighting maintenance costs are
cut by about 25-30 due to the increased
group-relamp interval, fewer conductors per
fixture to connect, reduced warehouse space
required for fewer lamp types, and reduced use of
exotic lamps.
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Technology Basics

• F32T8 lamp replaces F34T12 economy lamp
• Smaller diameter lamp looks brighter
• Fits in same four-foot fixtures lamp sockets
• Less lumen loss at end of rated life
• Fewer spot-relamp calls before end of life
• Can recycle (low mercury) or throw out ?
• Electronic instant-start ballast replaces
  magnetic
• Parallel wiring runs 1-4 lamps identically
• One lamp fails, the others continue to work OK
• Only 10 Wirenuts per fixture instead of 18
• Instant-Start works fine on rapid-start lamps
• Easy to retrofit existing fixtures

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Standards

• SNL Construction Specification 16501
• Mandates F32T8SP35 Lamps
• Mandates Electronic Instant-Start Ballasts
• Includes Compact Fluorescent replacements for
  A-19 R-20 Incandescent Lamps
• Prefers 2x4 Eggcrate Luminaires
• Forbids 2x2 U-lamp fixtures
• Forbids eight-foot HO-VHO fixtures
• Forbids T5HO fixtures

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Sample Information Sentto Building Occupants

• Your Lights have been Upgraded
• First, you have the new SNL-standard T8 Lamp
• Next, you have Dual-Level Switching with one
  Switch
• Flip the switch on, and all your lamps come on
• Flip the switch off and back on, and half your
  lamps are on and half remain off
• With all lamps on, you have the recommended 40-50
  footcandles office illumination level (SNL
  standard)
• With half the lamps on, you have less glare when
  you need it, PLUS you save us all some energy
• Flip the switch off, and we keep you in the dark
  .
• Call the Lamping Team at 844-3710 with Questions,
  Praise, Complaints, etc

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Conclusions

• Make the business case
• Improved lighting quality ? improved personnel
  productivity
• Lowered energy and maintenance costs
• Good correlation between predicted savings and
  actual power measurements
• Built on successes and documented them
• Use Commissioning to receive full benefit
• Lighting controls and night shutoffs work as
  promised
• Take credit for the HVAC savings
• Chillers dont cool 2 Mw in summer

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Questions?