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Lighting Research Program

Lighting Research Program. Project 4.5 Integrated Classroom Lighting System Funded by Finelite and California Energy Commission's Public Interest Energy Research (PIER) Program. What is the PIER 4.5 Study?. PIER stands for Public Interest Energy Research

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Lighting Research Program

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  1. Lighting Research Program Project 4.5 Integrated Classroom Lighting System Funded by Finelite and California Energy Commission's Public Interest Energy Research (PIER) Program

  2. What is the PIER 4.5 Study? • PIER stands for Public Interest Energy Research • PIER is part of the California Energy Commission • PIER 4.5 was a research project about classroom lighting • The project involved hundreds of people, included installations in real-world classrooms, and lasted over two years • Its findings are important for architects, engineers, project managers, contractors, school administrators and officials that set policies at state and national levels.

  3. The PIER 4.5 Team: • Architects • Leading lighting designers • Engineers • Energy professionals with leading utilities • Daylighting experts • School superintendents and their facilities teams • Staff at the California Energy Commission, Architectural Energy Corporation, Finelite, The Watt Stopper, FERRO and OSRAM • Teachers, students and staff at the five school districts where ICLS systems were installed in 18 classrooms

  4. Established Electric Lighting Practices PIER 4.5 built on established practices: PIER 4.5 Derivative Research • RP-1 and RP-3 Guidelines: • Increased control leads to increased satisfaction • Light the surfaces • Pay special attention to the teaching wall • Reduce glare • Light the instructor’s face • Design should accommodate space changes • Light uniformly. PIER 4.5 Research Collaborative for High Performance Schools Daylighting Study & Practices It’s not just about 50fc!

  5. PIER 4.5 reviewed proven daylight practices: PIER 4.5 Derivative Research • Quality daylighting improves student performance: • Daylight ≠ direct sun • Good daylighting increases student performance • Orient classrooms North/South not East/West • Use both top and side lighting • Use view windows. PIER 4.5 Research Collaborative for High Performance Schools Daylighting Study & Practices Established Electric Lighting Practices

  6. PIER 4.5 followed CHPS-developed guidelines: PIER 4.5 Derivative Research • CHPS materials are at www.chps.net: • CHPS focuses on improving the entire school • Design to <1 w/sq. ft. • Utilize indirect luminaires • Incorporate daylighting • Incorporate sustainable practices PIER 4.5 Research Collaborative for High Performance Schools Daylighting Study & Practices Established Electric Lighting Practices

  7. PIER 4.5 Research PIER 4.5 recognizes that teaching technology is changing! PIER 4.5 Derivative Research • Classroom lighting needs to change: • Classrooms are computerized spaces; glare needs to be reduced • Classrooms are being wired to the web; teaching needs to be interactive • A/V presentations are increasingly important at all grade levels • Daylighting provides special opportunities and challenges. Collaborative for High Performance Schools Daylighting Study & Practices Established Electric Lighting Practices

  8. PIER 4.5 culminated in developing the first commercially available ICLS system: PIER 4.5 Derivative Research • ICLS benefits are real and well tested: • Teacher satisfaction is increased by 9 to 1 • Energy consumption is reduced to 0.8 w/sq. ft. • ICLS can be installed within existing budgets • ICLS integrates easily with daylight controls PIER 4.5 Research Collaborative for High Performance Schools Daylighting Study & Practices Established Electric Lighting Practices

  9. PIER Study Methodology • Evaluated wide-range of products that would be available by 2005 • Designed and installed a preliminary ICLS system • Installed an improved ICLS in 18 classrooms in 6 schools • Monitored actual usage and energy consumption for a year • Conducted teacher preference surveys • Installed an enhanced ICLS at SCE training center • Developed a 181-page report that documents the study including data on each ICLS classroom, teacher preferences, and electric light and daylight interaction at the Southern California Edison CTAC facility (on line at www.finelite.com) • Provided a free, on-line ICLS performance specification and other industry links at www.finelite.com.

  10. ICLS Findings: • Use high-performance, pendant indirect luminaires • Provide an Audio / Visual (A/V) mode under teacher control • Locate easy-to-use controls at the front of the classroom • Use dual technology occupancy sensors with teacher-controlled delay • Tie the parts together with low-voltage, plug-and-play cables • Ensure one manufacturer assumes system responsibility • Offer options including: • Photo-sensors for daylight control • A dedicated whiteboard luminaire • Dimming for A/V presentations

  11. How the system works: General Mode: light faces, light vertical wall surfaces, cut glare • Walls and ceilings are well lit • But, veiling reflections can wash out the screen. • One simple switch removes all veiling reflections. • The lighting changes from “GENERAL” to “A/V MODE.”

  12. How the system works: A/V operation reduces veiling reflections • The screen now looks sharp • Downlight delivers the right light on desks • Dimming can be added as an option.

  13. How the system works: General Mode: Two outboard lamps are switch on • The ICLS luminaire is wired so the outboard lamps are separate from the center lamp.

  14. How the system works:A/V operation reduces veiling reflections • Reflector over center lamp is 96% reflective • 100% of light directed down to the desks

  15. ICLS typical layout • Luminaires • 2-rows • 14-foot centers • 24-inch suspension • Perpendicular to whiteboard • For over 50 foot candles at less than one watt / square foot, use 3100 lumen T8 lamps and 1.2 BF electronic ballasts

  16. ICLS w/ whiteboard Layout • Pendant Luminaires • 2-rows pendant luminaires • 14’ centers • 24” suspension • Perpendicular to whiteboard • Whiteboard Luminaire • 12’ Length • 1T8 cross section • 30” Setback from wall • 12” Suspension

  17. ICLS typical layout • Controls and sensors • TCC by whiteboard • Occupancy sensor in center of the room • Row switches by door(s) • Control Pack above door Teacher Control Center Control Pack Occupancy Sensor

  18. ICLS typical layout • Interconnections • Low voltage • Plug-and-play between TCC, sensors, and Control Pack • Row switches (high voltage) Row Control Dual Occupancy Sensors Teacher Control Center

  19. ICLS is energy efficient

  20. Monitoring data in Excel format Room 20 Changes from A/V to General Room 18, the control, Uses 82% more power Than Room 22 in “General Mode” Room 22 Changes from General to A/V Room 22 Lights were dimmed in A/V mode

  21. Heritage Oak School – Classroom 22 4) Downlight - Dim 1) Downlight - Dim 2) Uplight 3) Downlight Max 5) Uplight 6) Lights Off 7) Uplight 8) Lights Off 9) Uplight 10) Lights Off 11) Uplight 12) Lights Off 13) Downlight - Dim Watt/Sq. ft. Time Lighting Usage –10/1/03

  22. Heritage Oak School – Control Room18 1) Lights On 2) Lights Off 3) Lights On Watt/Sq. ft. Time Lighting Usage –10/1/03

  23. Heritage Oak School – Classroom 22 Watt/Sq. ft. Dimming Dimming Time = Savings Due to Downlight Mode = Added Savings Due to Dimming Lighting Usage –10/1/03 Dimming

  24. Heritage Oak School – Classroom 22 Watt/Sq. ft. Potential Savings Time = Occupancy Sensor Savings Lighting Usage –10/1/03

  25. Heritage Oak School – Room 22 Savings Due to Best Practices. Savings Due to Best Practices with Quality Lighting Lighting Usage –10/1/03

  26. Alternative Installed Cost Difference Energy (w/sq. ft.) Payback 15 Parabolics $2,745 ($2.86 / sq ft) $0 1.35 None ICLS System (A/V + Occupancy) $2,600 ($2.71 / sq ft) - $145 0.80 Immediate! Daylight Switching (each row) $175 ($0.18 / sq ft) $30 0.47 3-6 Months A/V Dimming (2 Rows, 1-Lamp) $500 ($0.52 / sq ft) $355 0.20 2-3 years 3rd Row (3 Rows / room) $1,100 ($1.15 / sq ft) $955 0.80 NA ICLS is cost effective

  27. Teachers prefer ICLS 9 to 1

  28. Here are before and after photos of two ICLS test classrooms • Heritage Oak – represents new construction • Dudley Elementary – represents a lighting retrofit project. (There is tremendous opportunity to understand this area better.)

  29. Heritage Oak control classroom(1.75 watts / sq foot)

  30. Heritage Oak PIER system(0.8 watts / square foot)

  31. Dudley Elementary School(1960’s vintage fixtures, 1.7 watts / sq ft)

  32. Dudley Elementary School(Low Voltage Retrofit, 0.9 watts / sq ft)

  33. Conclusion • ICLS benefits are real and well-tested • Building “Awareness” is our next challenge • Thank you for your support

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