holophane percepta ii brochure 5-78

7/28/2019 Holophane Percepta II Brochure 5-78

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UtrrJohns-Manville HolophanePercepta'IIluminaires.

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Designed todecrease glare andincrease useful,comfortablelight.


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veilingPercepta II iuminaires.Designed to eliminatereflections.

Illou h.d (lil'licLrll\ in |caclirg thcfre! ioLr\ l.arc. ii r bccaLt!c the \irrrt liLlctlhlrJldrr r it ing sanrplc is nrci|c sulrlccl lrt\eili!r! rcfiect i('rls or lcllccLc,:lglarethifr nla,\L r eldi rg rrilttcr.A llhoLLglr \\ c Uscil x \pccial pr irr L ing rnktr, (Jr r nrir l i.,c thc c1l c.l. iL . lin e 1llrcl lhil (is prc!cI]1 jn irll pencrlled Jr( )t c.. ( ) r .r crl.Lo rr slrghill lasir'r c\1crr1. in lc\Ll)o,rk'l1r)(l olher l-ir irrlcd nrltcr'rll\.I I rt.rc; L .'..,ir "'rr r,...{ntl *c llso callccl Lhe nuLulc oJ thc Lcstto vor f ilttcftion,But thc \cr) lircL Ll)ir1 \cllifg rcllacLior:..ri r rl '.r.r'' (r. r"r .not ca llcd to I lr!- rcil!l!-r -' l llcf li( 'rr j ii\\hiLt Inakcs ihcnr \o ]lll|nrl_LL . [tc{,1)]cLrnconscioLr:1y eonrpcr\xte l(,r',\ hxL thcl!,r.r . r.i', ...1r 1',1..r. I '. \'.nrore Iikcly to nrirlc nri\LuLc..Ilrc ic\irlt rJl Lhc Ir,)lrl.rn. i rcrclriJe. r:loss ol r r:LttI pcr lirr rrrLrrrc.N()\\ Lhit \\c \c lo(rkc(ir1 rirccJltcl'ol'vcilin!: rcJlcciion\. lc1-! lo(rk ut thcI cilli!c.Tiny mirrors form a veilVeilifg rcllccL i()n' rr c citli\cd ]r,\ nrirr,r-LiLc..r' spccu Liir -- r cllcalirrr \ o1 ligh tltrrir h(,lh iL tit\L (\uclr ll. lrllrr(i\\riirrrr)0f([ il\ biLckgrtrL ]r!l {'rLah iri l-lilpcrr. I hc:cfctlect ior\ llct t i il :r lrrnr irr,, rr; r c I rr.'rctrri ' . .. r' \...'..'.tcr ir. rcilirrg lelleetrt'rr:. 'I lte ll nl inoLr\ \ ciL r cLlLrcc: c,jrr lr'tt.tLretncL-n lxcL un!l bltukgroLrrrd. enLl thcenri rcrLllL i\ lo\\ ()l \aciiL)rlrtI .Where the readersits is importantllrc sou|cc ol reilrrrLr rall!-cli()rr\ i\ lrslrlL t r.- r". I, .back io*uril lt rclr(lirrg\trrlilce. L r:hl llLrnrthi: lLnglc cltorcr rpcrtL ill rcllc.li()ni l(jlroLlrlac lraifl tl)c Lit'k irtr, IIc rail.lcr'-e] e\ lL il llofnrlLl \ ic\.. rr:t iLlrirlc ()l'illiFro\irnirlcll l5 . Ilri..:rrtieilL ]'Lt , .r. .l , iclLllcd Llrc ollcnrling r()r(r. lScc I igrrrc I )l',,(..r'. .. \.1I t]rtt!t ( t)n\ri\'riit)tt (,rtitlL ltttL' l,'tLti:ri|: lltt l,iint::\ rc.,rfnrc:r\l\ ll l 1(iil\ ord lrgh L Jr (Jl) tlrc Ilir'rr.lirrlr zLr nc. dc'[. ',h(Jllrl lrc liri.rLi(r)c!i \ irlr lLrrr rxr c. 1,,rhc \iJc' irrrlc\rc r,1 rr: [.lLcL. In uitL rL]

cll.r r ,r,,nr.. \ hcr e :llltca i\ rl l\\ llJ \ rLi r1-.r'cnrrunr. rl is oltc- r LliliiiL:lt rLr eclrit'rcthi\ iilcilL.r riLrrgr'nrcnt. Sorrrr:.1LLr.lcrrt' rtrr'rrcr rLlLhli crpo'r'rl to h igh lcr c1. ,,

\ ciling J cll.eL r()ir\-Tlrc Ilolophune l'crceILx II lrLrrlirrlirc:Lrh:trrntie 1r lctiLrces liglrL lronr ollcrrilirrgrr, rc' in ilesrrLrL,rr: lrrrcl L,llicc:. Tlrr,rLrglrrlrc Lr'.- , rl e rpeciu L fr r:nlrt ic opt iclLl\\ \trnl t hlll l)rLr(luccj x tr, irl bair!rr lriLllc| lr-

thc I>cr'acflil ll rrrnrillll rc |cDlilac\ nluchLjl tIe rjllcnrling,'(jnc ligh t gcnc|lLied Lrycorrrcrtrorlrl.r :Lcrri { I igrrc l) \! iLhl)c r.ll!jul \rJc\ilrrl :tlrL 1L igrLr. l). I)..1iilrn bc lrr r lr ngt.l ir tl r crrc flrtr cr rr lt rtlsLill r rer'ir c Lrr ilor rr. !llcctr\ c iislr l.

I .l .. tlSer'/ ce C'.rf1er r tlrc a;SA ollL. rr.rrcst you.


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ESI.It'sthe realisticmeasureof illumination.

History of ESIIt has long bccn knorvn that taskvisibilit) is affected by tr',o vaIiables thechariicLerislics of the tas k anal t he ell'ect ofrhe lightiJrg s)stenr on the task. Lntil afew years ago. irr rcscarch on the taskitscll $'c macle onlr (luanli1111i\e mersLrre-ments of I he gross arnount of light on Ihctask. Wc did not iake into accollnt glareand other lactors that havc an aclver seeflect on lhe "seeability" ofa task. (SeeFigulc 4)

F ELrre,l 1./ei i! ref.r.l.rs ob:.!rechara.ters on ..n:o e b!11ons. Ert characiersare snnrp eid .!l lr e \rliln ,,r|ird b\rP.rc'jpla !|rinairc:iAlso, allhough we knew that lightdistribution and the viewer's positioncouid alter task visibility. rve had noprirctical standard of measLlrement andevalualion.

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To solve lhis problern. the IllunrinatingEngineering Societ) proposed Llsing thc' : dr. r'rl-U',., ,. , lr,rr irr,'.r,. Trr, . rsphcrc (Frgrlrc 5) as I stitfdird. andpublished thrs conccpt ir IllUnrirratingEngir-reer ing magazine in 197{1. Thisr'erc.r.. e.lro lre:.1ilir\ t. t:r(cr.:r'. r.tlsk contrlst nreasurenlenls in aclualinstallxtions anclalso in tesl spheres.Measurement proccdu fes $er e lll slourlined in I{QQ Report No.5 in theJoLunal of the lllLrrinating EnsinccringSociet) in JanLrar-v, l9?l-ESI measurement in a sphereLight ra) s introduced into rhe sphcre aresplit by a conical dcliector, then ricochctfronr all points u,ithin the while innershell.II " \ ic re- \'crc tc luok..r il L-r\1, .rr Lllcspherc at a typical 25" \'iewirEl angle, thirttask would. olcourse, be lighled partiall)fronr the offencling zonc. BLr! theillunrinat ion from thc o11'ending zonervoulcl be such a small pcr-ccntagc of thelotrl lighr rcaching rhe rask rhitl thercw ould lt Yer'y little loss ofcontrasl.Tl'le.legree lo \l'lich an actual lightifg\\.lerlr..pTr'rtC re lrrcct-cit rCt C.. Osplrere li!ll'l r i11g is kno\\ n as its FqLl ivalentSphere Illumil]al ion. or ESl.Ell'ectivcncss is evaluated b) measurinqand conrpar-ing thc contrasts lliven by thetwo sl s1efis. I l l hey irrc cqLral. lhe s) slentbein-c lesicd i! said lo have a ConlrastRcndition Factor (C'R F) ol l .00. Thu:,.if a classroorn had 70 tbotcxndles(calclrlated in the classical \\ay. butinclucline body shadow), it rvould havean ESI of 70 ibotcandles only if it had aCRF ol 1.00.Or, to pLr! it another wa), it would ha\ eT0 "eflecti\,e footcandles. "Early mcasurcment techniqucs andinstrumcnts wcrc cLrn'lbersome. ho\!e\,er,and led to computcr prograIns thatsimulalecl real situations and comparcdthenl to sphere conditions. Inlot ftlltionon computer compLltations of EquivalentSphcrelllrrrrirrrtin r'l Sll r. rrr.lr.dc.l .David DiLaura's article "On thca o rrnut.rlnr) ol FSI t.r ' r.lr.,r r\cJanuaq', 1975 Journal of the I llunrinatingEnginccring Societ).

Practical ESImeasurement & techniquesA recenl clcvclopnrerlt in the e\ oluLion oll-Sl is a Holophanc instrLrnre t thatJrcasLlres Lrollt acLLrill task contrast tndthc ccluivalent r,alue in a spherc ancl thcnconverLs thc rcrdinlis to IlSl values( l.igure 6). P.Y. Ngri. R.D. Zcllcrandi.W. Ciriflllh inrroduced the mctcr in thcirarticle ESI-Mcrcr Theot) ind I'racticillEnrboclinrcnt. published in the OcLober.I975..lournal of thc lllunrinatingEnuineerinr Socict\.

F !r!r. i ES ir.t.r.The meler mersurenrents arc casil) iakenand un(ler slood. and agree closcl) \\'ithconrputer progrllm mcasutements. ThLlsthe engincer can now usc calculaled ESItables in the design stagc and then checklhe actual !alues in the finishccl installa-tion using the ESI meter.How does CRF affect ESI?Mathemalically, in a rather startling wa].From a series o1-aclual case stLldies.*thrcc classroonrs \\'ere loul]d which haclpoints nrcasuring 90 "classical lbot-cantlles" (inclr.rding body shadow) ofr:sk illr.n in:rr o r. Unc hxd - L Rl o1.00. one ha.l .915 and onc had .766.Thcir ESl s were respectively 90.0,46.7ancl 16.4.In the abovc t\!o cases, a loss of48.1t;and El.8q; in ellectivc footcandles rvasexper ienced.'Educallon Facilities Laboraiorles Report:Contrasi Rend iion n School Light rg,"by Fosier K. Sampson.g!re 5. Lufr nous d fius o. sphere

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It is not easy to conlpensate for this Ioss.BecaLrse in nrcrclf increasing tootcandlcsto achicvc bett,:r sLrrroLlnd lighting.the intensily ol the offending zone wouldalso bc incr-eased. As a i-ule of thun'rb. a1.6 loss ofcontrast nra)' reclLrire an]\\'hercft-orrabout l0'; to l5r'; increaseinlirotcandlcs (See Figure 7). BLrt in sonecases. as above. it can fequire even alar-ger incrcasc.The moral: witll a bacl CIIF, yolr don'tget the visibility you pay for.

Perceptall luminairesalso minimizedirect glare.

Besicles veiling reflections. Pcrccpta IIlirm rlire. do nl eoLJll\ gooc 1ob uigetting rjd of direct glare, which is\no\\n J. J-\co rjor.3lu"e. cl,.e rn ir\harmflrl effect on visual comlort. As yoltcan see in the IES Visual C omlbrtProbability (VCP) dala, thc Pcrccpta I Ilurlinairc cxceeds recor'nmenclccl lcvclsof 70 for virtually all standard classroontand ofllce sizes.Bu1 as good as it is in visual conrfort andecononical operation. \ ,e nrLlst not lorgetits primary lunclion: provicling unifo|nrand high le\,els of ESI foolcandles lorhanclwriting and printcd tas k s.And il-lhere is one reason for Percepta IIluminaile popularity, it s ltcausc itmakes for good readine.

Typical Percepta II 5'x 5'cofferIES Visual Comfort ProbabilityWa I Rel -.clan...-so%C.i nq Ca! iy Rel ectance 80%Floor Cav ty Fei e.lance 20",;Work P ane !m ..ll.n-100 F..1.:n.l ec

(in 11.) Ceiling Heighl (in leel)8.5 '10 13 16 3 s 10 13 16

1% os3 ol contrast rquresl0!:ro15.;n.rease n,6lcand 6vsualperlomance

20,r;360203060802030'' 5080100304060x608010040

100

89 93 97 9988 91 95 9788 9r 94 9689 9t 93 9589 92 96 9887 90 93 9687 89 92 9588 89 9l 9388 89 91 9389 92 96 9887 90 93 9587 89 91 9487 88 90 9288 89 90 91 84 8388 89 90 91 85 8488 90 92 95 83 8l88 88 90 92 82 8287 88 89 90 83 8288 88 88 90 8r 8388 88 8e 89 85 8,188 e9 90 92 8,1 8388 88 88 90 85 8388 88 88 89 86 8.:88 88 88 8E a6 As

.85 85.13 7162 5953 4916 1239 .3531 .30.30 .2522 .1820 .16

79 8.1i7 aa78 7980 8082 8679 8180 808t 8l83 828r 828t 8l82 8l

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86839590a1a2918783a2828382

698l8l9085a280819186818l87818l85a2Can a 1.OO CRF be achievedin practice?\ c.. B\ rcduclr!. olierdi rguor e rr.:htirr;'\ltrlerrri r':r. r:rr'r!or-.r.urt^.t ro glttlrg.it is possible 1(] match the luminousdiffr,rsion sphere.

ln fact, that's jLrst what Pcrccpta IllLlnrinaires do. lnstead of projecting nlostof thc light fronr potential ollendingzones, when Percepta II luminaires areor.enred par dll(l t,' r're,, icu in-- Jirccr ion.thc twin-bealn distribution dirccts Iightfrom non-oli'endins zones

001,r!rhlfe$ nLl rron lask

Fig ! re 8.Con!e.tional lig ht

Coefficients of Utilization,Zonal Cavity Method.,cc 80 percenl,w 50% 30% 10%

0 9r 91 .9180 .77 T170 65 6l62 55 515.1 ,i8 43.18 4l 36t2 .35 30.38 3l 21133 .26 22.29 23 .18

75

.51.4536.322810

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This is why CRF valr,res lor Percepla llluminaires are always closc to 1.00. Andsonletimes even exceed i1So you r/o get the \,isibility you pay for.

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However you measurePercepta II luminaires,you'll find effectivenessand uniformity.

ActLral neasLrrelnenls on test installatronsconfir'm Percepla ll lrrnrinaire superiorperlbrmancc in conrparison withconvcntional fluoresccnt Iighting systenrs.Figures 1l thru 16 are conplrter readolrtsthat compare Percepta II luminairesmounled in 5'x 5'coffers with a systenusing conventional I'x 4',2-lamp fixtr.Lres.The 36-lanrp Perccpta ll llrminairesachicved an average illumination level 01'99 classical lbotcandles in the core areameasured (Figr.rre 11). This compares toan average iiiunrination of 11 1 classicalfootcandles rvith,l2 lamps in theconventional system (FigLrre 12).When usir-rg the zonal cavity nlethod tocalcLrlate the crllrc room, tbe averageclassical footcandlcs arc lorvcr. This isbccause the lowcr footcandle valLres nearthc walls are not ir-rclLlcled in the computer'-measurcd corc areas-Tl e Jecrcr.e'n the..rcruqe's .:reirte'with the conventiol'ral system I I I to 84lbotcandLes, or 24r;..With the Perccpta ll llrminaircs, thedecrease in the average is smaller 99 to88 footcandles, or llti.Uniform illuminationHowcvcr, a high avcragc classicalilluminatiorl level is not al$,ays a goodmeasure ofe1'lectiveness. Like all averages,it can be derived by combining very highpo'nt n cr..rrcn cr'ts rritl rcrr l,'u ln.ntrlled\ll-er'reIl\ an(1. n r,re inlfoIl"nll]. ilis nor a nreasure of the qLlaLiiy (ESl foot-candles) of the li:ht. A better measure oflighting effectiveness is tl're unilbrmityof illr,rmination rvithin a room.Figurcs l7-20 take the data |-on tllecomputcr conrparison oi the Percepta lllunlinaire and conventional systems(Figlues l5 and 16) and illLrstrate it ingraph lbrm shoq'ing the number ofpoints of equal ESI lbotcandlemcasurenlents. The top two graphscomparc thc ESI values looking length-wise, parallel to the rows ol6xtures. ln atypical classroom or ofllce, this is the waydesks would be orienled to the rows offixtures.

0510t5'2a36 fixiures 1.72 waits/sq fi.'Room:30'x 30'x 9'Reileclances: 80%, 50%, 20%Work pla n e: 2.5'

Typical Conventionalx 4' fixture

0' 5' r0 15 2Q2l fixlures, 2.00 walls/sq. lt.'Roonr:30'x 30'x 9'Rellectances: 80%, 50%, 20%Work p ane:2.5'

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F qlre T1 Fiqure T2.lnitial classical footcandles lnitial classical footcandlesDislance lrom Dislance lrom wesl wall (tt.)soulh wall (ll.) 5 7 9 11 13 oistance ttom Distance lrom wesl wall (tl.)sollh wall (ll.) 5 7 I 11 13 1s15131197

9.1 9 97.4 102 8 103.9 103 295.2 97.6 103.3 104 1 103.694.2 96.7 102 3 103.2 102 493.6 96.1 101.5 102 6 101.99t 2 93.5 98.8 99 8 99 037n a94 9.14 953 946

118 4 119 8 122.3 122 8187I198122.3 122I117.7 119 D 121.3 1224f67118012041208113 1 114 5 1166 117210.1.6 105.5 107.7 l08 5

106.,1106.6105.6104.8142.2975

151311

75

959113296 I 113.195.3 112.49,1 5 111 ,191.5 108.08,1.5 100.0

Co.e area ioolcandles:'Avg = 99, Max. = 107, Min. : 87,Unir. or llum. = 96%Zonal Cavity l,,lelhod ioolcandles:Avg. = 88

Core area iootcand es:'Avg. = l1l, Max. = 123, M f. = 8s,Lln i. oi I lum. = 9270Zona Cav ly Melhod Iooica.dles:Avg = 8,1

Equivalent sphere illumination Equivalent sphere illuminationsouth dnec- Distance lrom wesl wall (lt.)wall (ll.) lion 5 7 I 11 13 soulh direc. Dislance hom wesl wall (tt.)wall (lt.) lion 5 7 9 11 13 155

13

15 87.956.986.555.889.057686.056.888655.883455.187.954.681.853.985.650.779050.078.545976.4.15 3

N 69.2 67.2E 52I 61.6s 68 4 66.3N 69.9 67.9E 53.4 62.1s 68 2 65.7w 45.7 52.2N 69.8 67.8E 51 8 603s 66.0 63.5w 443 507

79.2 81.3 78.059.0 58.9 62.0TA.4 40.5 TT.152.2 54 3 5S.180.6 82.2 79.360.5 59.3 63.0781 7S5 76.153.1 54.7 59.880.2 81.8 78.458 6 57.7 60.975.5 77.0 73.251.6 53.4 58.180.1 8t I 78.857.5 56.7 59.813 9 76.0 72.15AA 52.6 5T.477.3 79.3 76.153.2 52.7 55.371.2 73.0 69.2466 489 52971.5 73.3 71.448.2 47.7 5D368.8 70.6 66.

NEsNEsNEsNEsNEsNEs

407 14.,1 61.8 112.5 67.A 2a.1224 A7T 94.2 42.4 34.9 69.8404 142 61 3 1117 6ri4 19A93 8 61.3 30I 39.4 89.3 69.141.4 141 624 1126 67.3 20323.0 67.6 9t 3 424 35.1 70.140.3 14.0 61.3 |0 8 65 8 19 694 7 61.5 31.1 39 4 89.,1 69.640.6 r4 4 6r.8 112 I 66.6 20.222.4 66.4 A9.A 41.4 34.1 68939.4 13.7 59 8 109.2 64.2 l9.l92.9 60.5 30.2 38.5 87.6 68.340.6 14.2 62.1 1128 670 20.021.9 65 3 87 7 40.5 33.4 67.338 I 13.4 58.9 108 2 63.5 18.591.s 595 29.6 37.7 86.2 66.738.6 14 0 59.0 108.0 63.4 l9 620.2 61 2 42.4 37.4 30.6 62.838.1 12 9 57.9 105I 62.1 17.986.7 55.3 27.2 3,1.8 81.1 62.333.3 13.7 50.8 g,l.t sq z Je e17.2 54.4 72.9 31 0 256 55639.4 13.7 59.0 101.,1 63.3 19.0TTA 49.Q 22.8 28.8 71.8 55.1

11

9 N 695 67.9E 50.9 59.5s 648 624w ,13.5 50.17 N OZ.g OSSE 47 4 55.1s 62.7 59.7w 407 4635 N 62.3 61.6E 42.7 54.4s 60.9 57.8w 370 422Lenglhwlse ES (Looking Norih)"Average 73N4in mlm 58Maximum 90Unil. oi i lurn. 92%Crosswise ESI (Lookins East)"Average 53M n nium 37Maximlm 63llnif of lllm 91%

Lenqthwise ES (Lookino North) "'5413111Unlf. ol lum. 52Y,

crosswise Esr (Lookins Easi)'r5517

F gLrre 15. Flgure 16.Nlaximlm 94Lrn I .1 il um 61%'Wl1h Advaice Mark I 2-lamp baLlasis."Summar es are based upon resu ts of values al 2/ incremenls lhroLrghoul lhe room as show. on lhedrawinq. Values at spec iic po n1s are lor one q!adra.t ol the room


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lin:S Avs ESI

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Perceptatr 5 x 5' Coffer Lenqthwise {Lookinq Nodh)

Conventionall x 4 Lengthwise ILookinq North)

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Better ESI rating\otc !lrr! thc Pcr'ccpLl ll lLLnrinaircs)\l!1r1 r.lri!\cs il 9l'; rinilarnlii\ ()l_illLrnrinlLlion \\ jlh x niirrorr ri1]rgc olllrclr\LL|crlcfl5 ff(inr 5S to 110 FSI, itnd ltnit\crirge (il ll I Sl. Thc conrcnrirrnels)slcrn hirr lL rt]lrclr \!i(lef Ixrllle ()lrxlirls. ll 1c' l l-1 I SI, errrl hes rno\c|nll tLn lirrrfl\ ol rllr rrrirriLLioir lc\clol_{)nll )lrI. \\ th ln lt\eluge tSl o1 5,1.Thc Lr()Lr()nr t\() srrplrs illt:sLrrte ESILLfilrjrrrri{} cr(jss\\ i\c. lookins Far }-.cr)ilLcLLlrr 1r) llrc to\\\ !)1 li\LL rcs. Ag;Lin- rltcI'crccl)lx II lrrrrri ririrc sr:lcnrdcnr()f:lrlltcs x nruclr grellter (legrcc ofLrnLlirrnrit\ llrrI I lr!' con\ eltLtoltxl \\sLcJI.I hc conrcnti,:,nrl s)\lanl s llcL oJ',,.1'.'rt...,1Llrc lLronr lcccir inS incl)icrrc I gltt.altllol glr both \\stcnls r.hic\c loode\criLgc ch\siclrl illurrLrrarion lcrcls in rhc-, r. . . \\ ir r P....,' ll L r r.sls{enr. ciL.h pcrjon !\ill bcnclil lionla\'eLr, cllecLi\c lisht. th|oLighoLLt tltc r-oont.Percepta II luminairessave energy! as well!R. c .r. r ..r .,.,r1.rli!lrl n!. Perccplu ll lr nrireilcs srLrr-crrcrs\ xrrrl nronc\ rl cL)rlrPiu ison \\ithr,r l rnur') lLrnrin:Lircs rrrrtl Iislrtilrg.'rsicms.A l]l-.icitl. con\cnti,)niLj ii!lr1 ng -rlslcltl\\rth;llfrtllLIJ bnllesLs thlLt Lr1 lrTas l'\.+'-1-ltLrrrp ti..tLrrcs i'l l aellLcri Lt:Cj l\\lLt\ lrat \!tritr('l,irit ol lloot \l)iLec.I'crccIlx II lrLr)rin,Lilc\ rrrr -i' ccntcrs Ltsconlr I \atls. tl\ing (lr \ \ir\ n!\ ol onc\\irlr (.0()l l\\) llrr s.LLLxrc l,j(jt. \\a cilllcelclLllla llre )errl) dolhr \ir\ingsrclrrc\r-,1 l)l lt [)elceptll ll 1L tllinei|csl\rcnr n ilf il\alugl j(1.000 \.1. lt.L)r rlilin{.I he l()r'nr rLia s:kw saviills/sq. ft. )i no. o1 sq il. >:no. oJ hoLrrs per year of operat cn Icost per kv,/h - iotal do lar sav ngs Derycarl]\ LL!rng iornc col]\cr\uli\c llgLLfcs irlthc lirrrnLLlit, \\ !' g!'t:.001 kw sav ngs/sq. ft : 50 000 sq. ir. r2600 hrs. )i S 0.1 per k\\,h55.2C0 sit!.os per ycar\rrrl L.ecurLsc l'crccl.lx ll lunrinxirc.,:l ,' .\. ,rl I\\iLils ol c()r1\ci.ronxl \\i1cnl!. \arrL ciUl

' 1 ..|,... |.t .laorrrlLLi,)ring insLlLlleLion iLnrl ol)ctil1 or.YttLr crltitttLc L() sll\c ntonc\ \clf lllcf\car an(l h!lir to sx\a ()ur cnerg)fcsolrfccs iLr 1]rc s;li]lr'Li:Iu.

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Perceptatr 5 x5 Coffer Crosswise (Looking East)

C,onventionall x4 Crosswise (Looking East).L-

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Specification &Ordering Data.Percepia lluminaires are aval abe in several variations ES andVCPvaLreswll varydependinqof lhe f xt!re cho ce, ayout and room specif cat ons. Options and accessoriesCalaloq numbersuffix DescriptionCatalog Dimensions in inchesLength Widlh For 277V ballast, substitLite''2" for' l" as lasl diqitoi calalog number

Externa fusing.Dimming ba LastPremium P ballast.Super Premium P ballast.24" stem hanger (2 req!iredper i xture), lor suriaceunlts only.

Height ' 2"D-t

.PB-SB06125

Surtace Mounled Units620181116201ElMl6201E1i|16201E2116201E2M1

1-F40/RS1-F48/t-lOI F96/HO2 F4O/BS2 F48tHA48-5/848 3/497-3/897-11197-3/8

6 7/86-7l86-7186-7/86-7/8

6-3/r67 -1141,1t16 3/1611t4

Noter Slems Jor pendant mounting (06125) are optiona Ly avarlab eCollers lor lnve'ted T-Bd, Ceiling

holophane percepta ii brochure 5-78

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