Architectural Ambient Lighting for Office Applications

1 Architectural Ambient Lighting for Office Applications 2 COOPER Lighting 1121 Highway 74 South Peachtree City, Georgia 30269 1 hour/ LEGLUM COOPER Lighting is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available upon request. This program is registered with AIA/CES for continuing professional registration. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material or construction or any method or manner of handling, using, distributing or dealing in any material or product.

2 Questions related to specific materials, methods and services should be directed to the program instructor. This presentation is protected by US and International copyright laws. Reproduction, distribution, display and use of the presentation without written permission of the speaker is prohibited. Cooper Lighting 2009 3 Learning Objectives Incorporate current energy codes into Lighting design projects Evaluate and select fixtures that are best suited for various Office environments Understanding available Lighting technologies Utilize optimal technologies to maximize energy efficiency 4 Not a new concept Evolution of Architectural Lighting 5 Not a new concept Evolution of Architectural Lighting 6 1980 s 1970 s 2000 s 1990 s 2009 Office Trends in Recessed Lighting 2012 7 1970 s Low technology A12 lens T12 lamps Magnetic ballasts High brightness Paper tasks

3 8 1980 s Introduction of VDTs High cutoff High contrast ratios Cave effect Magnetic ballasts High w/ft 2 9 1990 s Recessed Direct/Indirect greater uniformity enhanced aesthetics low glare Other trends T8 lamps grew in popularity T5 lamps introduced Electronic ballasts 10 Remember a couple slides ago? 1990 s 11 1990 s Indirect Suspended Lighting Even greater uniformity Less strain on the eye Enhanced Architectural feel Many options on shape & scale Ease of installation Alum. Extruded products were expensive Steel became reliable & more cost effective 12 2000 s High efficiency High performance Pleasing aesthetics T5 acceptability Dimming/controls integration LED Introduction 13 Goals of Office Lighting Effective communication Written, visual, aural, electronic, face-to-face Enhance productivity More comfortable visual environment may lead to increased productivity Aesthetics Worker perceptions.

4 Mood Use energy efficiently Code compliance Lower energy costs 14 90-100% downward Distribution varies from widespread to concentrated (shielding media ) High CU, system efficiency Potential glare problems (direct, reflected) Potential cave effect (deep cell louvered fixtures) Potential discomfort glare outside normal field of view Direct Lighting 15 90-100% upward Relies heavily on ceiling/wall surfaces Brightness uniformity on ceiling is critical to glare free task Lighting Indirect Lighting 16 Enhance energy savings by employing the latest Lighting control technologies Energy Considerations 17 Trends in Office Lighting Design Controls Occupant Sensors Photocells for Daylight Harvesting Control Panels Dimming Ballasts/Drivers 18 Dimming & Controls Allows the user to reduce overall energy consumption by integrating preset limits

5 On usage Utilize switches, timers, occupancy sensors, etc Daylight Harvesting Photosensors Trends in Office Lighting Design 19 What factors contribute to visual comfort? Light levels Glare Color Uniformity Visual Interest How does LED impact? Visual Comfort 20 Light Levels Lower levels are visually comforting May lack adequate levels to perform certain tasks Higher levels are more task oriented May be less aesthetically pleasing Choosing the right light levels for the environment is critical to visual comfort IESNA can be referenced for recommended light levels for individual tasks Glare Direct Glare: bright fixtures and windows in line of sight Reflected Glare: light sources reflected on glossy surfaces Visual Comfort 21 Color Important in differentiation of the perception of light.

6 Measured by color temperature and color rendering (CRI). Higher the CRI, truer the color is perceived High CRI = Retail, High end Office spaces Low CRI = Parking garages, lots Uniformity Bi-product of efficient Lighting Vertical surface brightness Sense of Spaciousness Less stress on the eye Visual Comfort 22 Visual Interest Non-uniform Lighting with peripheral emphasis (accent Lighting ) Brings presence to architecturenim LED Impact Earlier solutions offered lower delivered lumens to minimize source brightness and glare Optimized solutions offer higher LPW while maintaining visual comfort Control friendly solutions with minimal cost add Visual Comfort 23 Legislation and Recommended Practice ASHRAE EPAct Extended through 2013 State/Municipal Codes CA Title 24 Other Local Codes based on ASHRAE DOE requires states to certify energy codes commensurate to ASHRAE 24 Building Type 2001 2004 Hospital W/ft2 Library/School W/ft2

7 Manufacturing W/ft2 Museum W/ft2 Office W/ft2 Parking Garage W/ft2 Retail W/ft2 Legislation and Recommended Practice Easier to Hit W/ft2 with LED 25 ASHRAE Energy Efficiency Mandates for Control Devices Control Devices Range in ft2 In Spaces < 10,000 ft2 each Control Device may control a max 2500 ft2 In Spaces > 10,000 ft2 each Control Device may control a max 10,000 ft2 Controls must be visible & accessible to occupant Min. 1 control for each space with ceiling height partitions Task Lighting to be controlled separately Automatic Shut-Off requirement Applies to buildings > 5000 ft2 30 minutes LIGHTS OUT after last occupant detection Emergency Lighting is exempted 26 USGBC: LEED USGBC initiative - sustainable design - categories of compliance - varying levels of certification Lighting specifics and LEED.

8 - energy efficiency - light pollution control - daylight utilization LEED references ASHRAE as baseline for energy efficiency 27 LEED Credits Related to Lighting LEED NC (2006) 14 Possible points out of 69 can be Lighting Specific Light Pollution control (Sustainable Sites) Energy Optimization (Energy & Atmosphere) Controllability of Systems (Indoor Environ. Quality) Daylighting & Views ( Indoor Environ. Quality) 28 Legislative changes Banning Incand. September 1, 2009 EU bans sale of most Inc lamps 2012 US begins banning Incandescent lamps 2014 All Incandescent lamps banned T- 12 lamps in 2012 November 2009 Australia bans all Incandescent lamps 29 Technology & Trends High-Performance T8 30 Technology & Trends High-Performance T8 Lamp (32W) 3100 initial lumens vs.

9 2850 initial lumens 2900 maintained lumens vs. 2600 maintained lumens 24,000 hrs vs. 20,000 hrs Energy Using normal ballast factor, can save up 20% over std T8 Greater fixture efficiencies Greater system performance 31 High-Performance T8 T5 & T5HO lamping Technology & Trends 32 High-Performance T8 T5 lamping Lamp (28W) 2600 initial lumens vs. 2850 initial lumens (32W T8) 2418 maintained lumens vs. 2600 maintained lumens (32W T8) 36,000 hrs vs. 20,000 hrs Technology & Trends 33 High-Performance T8 T5HO lamping Lamp (54W) 5000 initial lumens vs.

10 2850 initial lumens (32W T8) Almost double output out of 1 source 4500 maintained lumens vs. 2600 maintained lumens (32W T8) 36,000 hrs vs. 20,000 hrs Application Smaller profile fixtures can be achieved Technology & Trends 34 High-Performance T8 T5 & T5HO lamping Ballast Factor Flexibility Low ballast factor (.77) Ideal for corridors & restrooms Normal ballast factor (.88) Task areas High Ballast Factor ( ) Higher mounting heights Technology & Trends 35 High-Performance T8 T5 & T5HO lamping Ballast Factor Flexibility Building Construction Trends Shallow plenum spaces Restricted ceiling heights Use of natural light Technology & Trends 36 High-Performance T8 T5 & T5HO lamping Ballast Factor Flexibility Building Construction Trends SSL Low Operating Cost Delivering Energy Savings Initially compared to Inc.