De m o n s t r ation and Evaluation of Tec hnologies and Applications • Lighting Research Center DELTA SnapshotsI s s u e 6 Lighting for Dormitories

The risk of fire associated with - (“quartz”) lamp torchieres has prompted many colleges and universities in North America to ban their use in dormitories. Now ambient lighting can be produced safely and efficiently with torchieres and task lights that use compact fluorescent lamps. Application Profile Bu c k Hall is an ivy - c o vered dormitory at Rensselaer Pol y t e c hnic Institute, in Tro y, New York. Students live and work in their rooms, studying long hours. Despite their young eyes, they often find the standard room lighting inadequate for prolonged reading.

Rensselaer banned tungsten-halogen lamp torchi e r e s in 1996 when one dorm building sustained damage from a fire caused by such a luminaire. Students instead began to bring in incandescent table lamps and task lights, often sever al per dorm room, to meet their lighting needs.

The dorm room illustrated here features an ENE R G Y STAR ® to r chiere with two 36-W compact fluorescent lamps that can be swi t c hed to provide two levels of uplight. A compact fluorescent task light supplements the illuminance on the desktop. Lighting Objectives • Increase general light levels What is the ENE R G Y STAR pr o g r am? The U.S. Environmental Protection • Pr o vide good color rendering, warm-color light Ag e n c y and the U.S. Department of Energy have initiated a program • Minimize and reflections in computer monitors to encourage the use of energy-efficient appliances and lighting prod- ucts. Manufacturers that join the program with products that meet the • Avoid the fire hazard of hot tungsten-halogen lamps ENE R G Y STAR performance criteria can label these products ENE R G Y STAR • Reduce frequency of lamp replacements luminaires. See the ENE R G Y STAR web page for more information. • Avoid high energy use ht t p : / / w w w. e p a . g ov / a p p d s t a r / f i x t u r e s / • Keep low initial cost for student Lamps, Ballasts, and Energy The torchiere uses two CFM36W/2G10 (“flat” configu- ration) lamps and, with the ballast, uses 65 W. Rapid- start electronic ballasts are used for energy efficiency, reduced noise, and minimal lamp flicke r . The task light uses one CFT13W/GX23 lamp with a magnetic ballast. When these two luminaires are on, this 100 ft2 do r m room uses approximately 83 W. 3 cd/m2 2 2 7 cd/m 9 cd/m2 18 cd/m 164 cd/m2 386 cd/m2 165 cd/m2

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Be f o r e ret ro f i t After ret r ofit Illuminances measured with existing 60-W Illuminance measured with only 0 1' 2' 4' incandescent task light, 80-W table lamp, and compact fluorescent torchi e r e 20-W compact fluorescent cylinder downlight. and task light operating. 0 1/2 m 1m Total room power: 160 W Total room power: 83 W Design Highlights Illuminance: Vertical and horizontal illuminances have dramatically increased compared to the use of the over - head light alone. Students comment that the space seems brighter and more pleasant. Color: The compact fluorescent lamps in the torchiere have a correlated (CCT) of 3000 K (w arm), while the CFL in the task light has a CCT of 2700 K (warm). Both lamp types have a (CRI) of 82. Visual Comfort: All compact fluorescent lamps are concealed from the student’s direct view. Light Output and Heat: The lamps in this ENE R G Y STAR to r chiere are rated at 2800 lumens each, to produce a total of 5600 lumens, not including light loss factors. When both lamps are operating, their output is comparable to that of some 300-W halogen lamp torchieres. Howe ve r , the surface temperature of the compact ran g e s only from 90 to 185oF, far lower than the 750 to 860oF temperatures of a 300-W halogen lamp. DELTA Snapshots • Issue 6 • May 1999 Buck Hill Dormitory, Rensselaer Polytechnic Institute, Troy, NY Sponsor: U.S. Environmental Protection Agency

Lu m i n a i re s : Tor chiere, Emess; DE L TA Members: task light, American Lighting Consolidated Edison Company of New York, Inc. Ph o t o g ra p hy : Randall Per r y New York State Energy Research and Gr aphic Design: JSG Communications, Inc. De v elopment Aut h o r i t y Northeast Utilities System DE L TA Prog ra m : Lighting Research Center Di re c t o r s : Naomi Miller, Sandra Vas c o n e z Re s e a r ch Specialist: Jennifer Brons Pu b l i c a t i o n : Judith Block Dr awi n g s : Javier Ten Rev i e wer s : Mark S. Rea, Russell P. Leslie, Kathryn M. Conway

For publications ordering information contact: Lighting Research Center, Rensselaer Pol y t e c hnic Institute, Tro y, New York 12180-3590 • FAX (518) 276-2999 Phone: (518) 27 6 - 8 7 1 6 • e-mail: [email protected] • World Wide Web :h t t p : / / w w w. l rc . r p i . e d u Co p yright © 1999, Rensselaer Pol y t e c hnic Institute. All rights reserved. Neither the entire publication nor any of the information contained herein ma y be duplicated or excerpted in any way in any other publication, database, or other medium and may not be reproduced without express written permission of Rensselaer Pol y t e c hnic Institute. Making copies of all or part of this publication for any purpose other than for undistributed personal use is a violation of United States copyright law.