GE Projector & Reflector Lamp Application & Design Brochure 1959

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    PRO.lECTORGrNGIR EFLECTORLAtlPls

    ... opplicotion ond design doto'*

    q.{

    LARGE LAMP DEPARTMENTGE]tIERAL@EtECTRIC rw

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    PAR-38(Sidc Prong Base) JV.lG Ord.riis.id AbbreviltionBulb,f75-Watt 75PAR/SPOPAR-38 75PAR/FLGI

    15OPAR/SP]150-Wdtt 15OPAR/3SPlPAR-38 15OPAR/FLOl5oPAR/3FLO200-Wdtt 200P4R46/3NSPPAR-46 e00PAR46/3MFL3OOPAR56 /NSP:u^u;1:( rooPARs6 TMFLrn K-)o 3ooPAR 56lwFL5OOPAR64 /NSPlu^o:Y1( sooPAR64 TMFLrn K-o4 5OOPARo4TWFL

    Med. Skt.Med. Skt.Med. Skt.Med. Side-prohsMed. Skt.Med. Side-pronsMed. Side-prongMed. Side-pronsMos. End pronsMos. End p'onsMos. End pronsE xt. Mog. End prongExt. Mos. End pronsExt. Moq. End prong

    Medium

    MosulMosulMosulMosulMosulMosu IMosul

    Spot $9.30Flood t 3aSpot I 30Spot t.60Flood 9.3aFlood 2 6a

    Approx. App,or.Std. Be.m lnitidlPks- Spr..d BcrmDesreer 3l Lumcnr il19 30' x 30' 48019 60' x 60 60012 30 x 30 1 ,1001? 30-x30 1,10019 60-'x 60' 1,350l? 6C x 60- 1,3s012 11 ' ,93' 1 ,20A19 2o--x40' 1,300

    750 4,000750 1,7001,130 10,5001,710 r 0,5001,130 3,7001 ,730 3,7002,3 50 39,000?,3 50 11,0003,6s0 70,0003,650 ??,0003,6s0 I0,0006,000 1 10,0006,000 3s,0006,000 12,000

    Narrow SpotNarrow SpotMed. FloodWide FloodNanow Spoi 'l0.15Med. Flood 10.75Wide Flood 10.7s

    12 15' , 20'12 90 '' x 35'19 30' x 60'8 13' x 90'8 90'x 3s-8 15' x 65'

    4.5 04.5 05.205.2 0590

    1,8002,00c2,1 003,0003,4003,500

    5,;4+4455

    666

    ftJi!J *,i*'i 'r:r a\It\.\ NO

    Ord.ring30R90r5R3o/SP7sR3o/FL15oR/SP1soR/FL3o0R/SP3ooR/SP/1O3ooR /3SP(t300R/FL300R/FLl1O3ooR /3FLO5ooR/3SPO5o0R /3FL@500R59750R521M/RBst

    Al"iR"?0

    30-VattR,2 075-WattR-30150-WaitR-4030O-!(airR-40

    500-WattR,40s00-w R-52rso-w R s?1000,\( RB,5?

    List Std,:l

    60602424

    $1 ?o1251 .251 .251.95165 943.30 24360 241.65 943.30 243.60 244.2C 244.20 244.00 64.90 65.90 6

    6,404 22,OOO6,400 5,9007,550

    s0' 400130 61040'110'35 ', 1,80035 1,80035 1,800

    1 1 5 9,8001 1 5' 9,8001 1 5' 2,80035' 3,1 00115' 5,400

    114 1,800 5 irr,tto 430 5!r810 1 ,780 6,000 6,ld1 ,500 1,180 1,t50 6ii3,100 13,500 6i;3,100 13,soo 6ri:,700 1 3,500 1) t3,700 2,700 6+3,100 2,1oo 61,;3,700 2,100 1)l

    1?,10018,000

    11t1ti11%11%12%

    O He.t Rerist.nt gh$.Nore.r Technical data in this bookler are average values. Individual lamps may vary from the values pub-lished herein.Technical data are subject to change without notice.The lamps shown. in_this bulletin are standard-voltage stock items. For aeronaurical, milirary, train,and other specialized services, more rhan tOO typea, sizes, and voltages of pAR & R la;is ar;available.

    PAR.46 PAR.56

    a+J| ' R-5t,,/ '.*/ l"\l1\

    TO SCALE

    I-J E]ttll.ll:t \\\\-\ ,' \\R.40R.40(Mogul Barc)

    4r

    R-30

    SpotSpotFtoodSpotSpotSpotFlo odFloodFloodSpotRefl. FloodRefl. FloodRefl. Ftood

    The t.lcd lvet g. lil. olP,oiector (PAR) l.np3 !nd Reff.ctor (R) l.hp! is l,ooo ho!6. The.v.r.g. lumenj.nd c.ndtepowe, d. 85% ot iniri.t.O M.rinlh bulb di.nc{err, m..rut.d i. eighth. ot.n in.h,.rc indicltcd by thc n!hb, following the lct., or letler d.noring butb sh!pc. Th!,, rh. m.rimundi.m.lcr ol.n R-,lO bulb k 5 inch6. O Prics .rc subjc.t to.h.ns. wirhou{ notice. ii) ro 1O% otm.ririm cdndtepowe,.i;r C.idl.Dowet.v.r.sc i. lh. cenlr.l 5'coic ,or SP.nd NsP.

    Approx, ApDro!. ADqo!,Bc.n lnitirl Appro,. lniti.l M!r.Sp,eld Belm Tot.r CP av. in Oy.hDeg,eer.:,1 Lun.nslir Lumcn' 10" Co.. !. Lcnerh80- 14s 900 3s0 3 i+

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    '\, J PAR-i?al spor,ary,/' ,r&*.."1f ryV;ioroiector and Refler:tor lanps are directionalFlament lamps that have their own builr'inreflectors. Their well-controlled beams makethem highly effective for spot- and l1ood'lighting applicarions. Convenieflce is the;routstanding feature. \X'ith tbese lamps, newintriguing lighting and color effects can becreated indoors and out,This booklet provides the lighring desigoerwith useful data on Proiector and Rellectorlamps for application design purposes. fhesedata are useful also in selecring lamps for manyinformal "pu.a-liaht-right-here" applications.

    Commercjal, industrial and residential appli-cations of proiector and rellector lamps are

    Proiector lamps are popularly called PARlamps-the letters stand for Parabolic Alu-minized Rellector. The bulbs are of thick,ha.resistant (or "hard" ) glass. They aremold-pressed all'glass units witb reflectors ofprecisely forrned conrour in which the fila-ment is rigidly mounred at rhe focal point.Ligh. distributioo from the lamps (spot orflood) depends on the design of the coverplate portion of the bulb, as illustrated on theright-hand side of the page. PAR spot lampshave lighdy stippled cover plares; the floodlamp cover plates incorporate molded pris-matic lens elements,

    Accr.rrate beam control, over-all ruggedness,and rhe weather resisrance of PAR-38 lampshave made PAR lamps widely used light sources

    Reflector lamps are comrnonly called R lampsThey differ in construction from PAR larnpsin that rhey are of blown rather than Pressedglass. They cost less thao PAR lamps and areused in some of the same types of applicationsRJamps are used most efrectively whereweather resistance aod great ruggedness arenot required. Som R lamps are available inheat'resistant glass for specialized uses thatmay subject them to such severe temperaturechanges as occur when warer falls on them.The reflecting surface of all R lamps is ofsilver deposited on the roner bulb wall Spotor 1lood distribution is determined by thedensity of the inside frosring of the bulb.Seam patterns of R lamps, both spots andfloods, are wider and less precisely conirolled

    Colored PAR lamps are available in the new1oo-watt size with new, bigh-transmission col-ored lenses. Colored R lamps are available inthe 15o-watt size. There are four basic huesarailable: red, yellow, green, and blue. Alsoavailable are two tints, pink and blue-*hite.

    numerous and varied; display lighting, generalillumj.arion, decorativc lighting, work lighr-ing and .alery lrghrrne arc a f.* uf their prin-cipal uses. Around the home these lamps arehandy sources for utility, protectioo and decor-ation. They for example, ofextending the beauty o{ the garden into thehours after dark, Jighting drives and walks,discouraging prowlers.

    Increasing use by the lighting spe.i"li.t ".well as by the anateut lighting-man'around-rhe-hoose has lcd {o rhe dereloprnent of a largevariety of larnp wattages, beaor patterns, colors

    for a rirtually unlimited variety of applicationssuch as display and accent lighring, decora-ti's and utilitt IlooJlighring. uerduulignlighting. .,nd lighrrns in .en iic ar

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    Bersic procedures OTHE TAMPS YOU CHOOSE. . .The effectiveness of a lighting systm using PAR or R larDpsdepends upon the selecrion of lamps of suitable beam spreidand caodlepower. Beam spteads and candlepower valuesof P{R and R lamps are shown in rhe rable on Paee 2,.rnd inmore speci6c derail in the candlepo*er rurre. on PaserrO and I I.The footcandle patterns on Pages 6 through 9 graphicaltydescribe the areas that PAR and R lamps may be elpicted tolight, and the footcandle values that may be expectid in thelighted areas.Suggeslions lor lhe use ol lamps ol various lypes and tvaltages:

    3O-watt R-2O For close,range accent or inspection lighting,75-watr PAR-3a and for downlighting in areas where relativeiy75-watt R-30 low levels of illumination are required.PAR-38 For medium-range accent or inspecrion ligha,ing, downlighting, moderate lloodlighringlevels and decorative lighting outdoors.PAR-.{6 For general lighting in show windows, med-R-4O ium range spotlighting, and higher leveloutdoorlloodlighting.PAR-56 For long-range or high-brightness spottighring,PAR-6.1 highJevel or larg,e-area floodUshtins, showwindows, building facades, parking lots.For general lighiing, especially in locationssuch as industrial areas where dirr createsmaintenanceproblems.

    BEAM SPREAD.,.\1 ide-beam or flood lampr are usually hesr .uired ro shorrrhrows or low floodlighring lerels. Narrow-beam or soorlamps are besr ruited io long throw. and higher levets'offloodlighting or display lighrins.Design and installation of a lightins system can ofren besimplifed by combining narrow- and wide-beam lamps at aconvenient mounting location. Vhen used in combination. thenarrow-beam lamps should he.rimed at rhe disrant porrion\ ofthe area being lighred.and rhe wide-beam lamp. ir rhe oearportions. The selection of lamps of proper beam spread, andthe carful aiming of rhem when they are installed,ire impor-ranr to rhe elicienr use of a lighting rystem.MAINTENANCE FACTOR (MF)-The mainrenance f;cror ir rhe percenrdge ot roral liqhr ourpurured in calculations ro offser deprecidrion efrect.. Such etreirrresult from normal lamp aging and the gradual accumulation ofdirt on bulb faces or on rhe louvers or biflles ot lamo housiner.Normdl lamp depreciarion, qhich occur! as burnine hour:increa5e. a\erages only abour t5do throughour life.REFLECTANCE+It is important to consider the reflectances of surfaces indetermining the foorcandle levels needed for efiective lighting,and particularly for lighting verrical surfaces. A, clern, lishi-colored surface may refle.r ', ot rhe lighr rhat reache. ir; adark or dirry .urface mav reflecr I , or liss. Hence, for equaldisplay brighrness. rhe dirk rurface ii. ,tit".,,"-pr.t-*;li'"-quire about I times as much illumination as the ligLrer surface.FOOTCANDTE SELECTION...The user srho is undecided as ro qrhat footcandle levels toprovide for spcifrc lishting applications will 6od guidancein LS-119, "Footcandles in Modern Lighting Practice."* For additional information on Maintenance Factor andRellectance see G-E Lamp Division publication LD-2.

    -+-

    y'_o_______ADecide on footcandle level to be provided.Select a lamp mounting location. (ionsider, for example:direction from which object should be lighred for mostetreLri\e !iewing. freed.m fr.'n drre.r glare in rhe ere. of -i:iil:f :: "'fi , ly'::lli.*ni:iio.l' :1.'i t' - n'",'c'it'"'"' JReferriog to the sketch, measure mounring disrance "A" andaiming distance "8", and rhe dimensions of rhe surface orobiecr being lighted, "(i" and "D."Use the "Footcandlc Pafteros" on Pages 6 through 9 as aguide to lamp selction. These palterns indicare graphicallythe footcandle distributions for a variery of lamp aiming angleswhen dimension "A" is r0 feer (2O feet for high,watrage PARlamps). A rable of multiplyiog factors for other mounringdistances is oo Page 7.

    llluminare the surface shown in the sketch ro I00 footcandles.5traight-on aiming: Larnp aimed ^t right angles tocenter of surface (o'aimiog angl). Assume (hat "A" : 1ofeer, "C" : 2 feet, aod "D" : 2 feet. Examine the footcandlepatterns (Pages 6 q) under the Aiming Anglc hidings "0'."Sele.t ths.ne rhar curncr r'lo.rrr ro pro'iding l"r' fuorcandle\dr bearn (cnrc' and or'er an rrea rpproximetell 2 feet .qr.are.The 1 5o-watt PAR"38 spor s ill be found ro have a footcandlepattern that meets these requirements rather closely.Angular Aiming: Assume same dimeosions as ahove for"A," "C," and "D" and 5 feet for "B." Use aiming distance "B"as a guide to the applicable footcandle patterns. Distance"8" in the patterns under the Aining Angle heading "30'" isclosest to dislanc "B" in our example. Again, select rhefootcandle pattern that comer closest to providiog IOO foor-candles ar beam center and over an area approximately 2 feetsquare. 'lhe 300-walr R'.lO spot lamp (which has the samelfi;, i*lli,?';:";"P,"; JJ;';'.!::".,,:'oJJ.l:;ii.':Jli::'-t fOVertical surlace: Procedure is same as in both cases above.Simply consider the footcandle patrerns as being in a ver.tical plane.

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    this is so, use long'beam-tbroq'lamps such as PAR-46's, -t6'sand -64's. (See "[ootcandle Patrerns," Pages 8 and 9, andrhink or rhem a. being in rhe rerrical plane.

    Utilization factors should be carefully estimated. Oftn thevertical surface being lighted intercepts only a smallportion of the light beam. For example, tall narrow srructuressuch as steeples may permit utilization factors of only .10.\{ith the above consideratjons in mind, use the procdureoutlined above for doodlighting horizontal surfaces. Justremember rhat your cxlculations are for a plane shifted 90'from horizootal.

    "Inirial Beam Lumens" are found in the table of essentiallamp dara on Page 2. Uf 'rands for Utilization Faclor rePre'.e"rlng the de.igner s be:r esrimate oI the percentage of beamlumeoi thar wilf fatl qirhin th drea ro be tiehred. A rvpicalUF may be about.8o. An MF (Maintenance Factor) of .8ois also typical.With (he approximate number of lamps as a guide, use themethod explti;ed on Page 7, "How To Use the Patterns",to determine lamp locari,ons. a;ming djrecrions, and heamspread\ ro proride rhe degree of uniformiry decired

    Building facadcs,.rchitectur.l clemcntt,towers, steeples, walls, display panels, etc.U hen decidjnq how many fo.xcandles ro proride. bear rrrmind rhar rhe re;\on for lishrins a rerrical .urface is u'ualll'o in.rease rhe briehroe!s oif rhe-surface irself Theretore. rhe."fl".,ur." of tbe iurface musl be lrken inro ac(ounrr a darlsurface requires more illumination than a light one forequal brightness.\vhen floodliqhrins rall buiJding.. aiming foinr\ un rhebuildine face m;v be \omewha( more remole from lamP loca-tiun\ Ih"an is tbe case in floodlighting horizooral areas Vhen

    Uniform seneral lightins for rooms, lobbies and entries,shipping docks, covered walks, corridors, counrer tops, etc.

    NOTE: In most areas where PAR or R lamps are emptoyedin gneral downlighting sysrems, shielded, louvered or balTledlaorp housings are recommended for visual comforr. To designgeneral lighting systems iocorporaring such bousings, orsystems using R-52lamps, use the design procedure describedin C'[ Large Lamp Dept. publication LS-173, "Issential Datafor Geoeral Lighting Design.The following procedure pertains to rhe design of generaldownlighring systems using exposed PAR or R larnps whenvisual comfort is adequateLy assured b) high lamp mouotingsor concealed mounting locations between beams or orhershielding elements.General downlighting is based on straight-on, or 0', aimingas described in the example Lrnder "Single-Larnp" applicationsabove. PAR or R lamps are mounted with their beam cenrers\paced at regulrr inrerrals. and q irh rheir bcarn. orerlappeJ roproduce uniform illJmiodrion un a,url;ce helos.Use the "Footcafldle Patterns" Lrnder the Aiming Ansle head-ing\ "O on Page, o rhrough ,i ro \elecr a lamp that pio'ide. amaximum footcandle yalue that is nearly the same as the designfoorcandle lerel. Applv rhe proper iacrorr lrom rhe rahle"For Other l\founting I)istaoces" (Page 7) if mounring dis'tance js to be orher rhan l0 feet (2o feer for high-watragePAR lamps ).Use rhe "Spacing-!o-,Nlounring-Distaoce Ratios' (Page9)ro determine rhe regular spacing inrervals between lamps.To calculate the number of lamps needed ro iight an areadivide the total area to be lighted by the area lighted perlamp. (The area lighted per larnp is simply the spacing inrervalmultiplied by itself. )

    PAR clnd R lamp applicotionssports fields, prrkins lots, yards,gardens, drives, work arcas etc.

    Determioe the size in square feet! and the general pro'portions of the area to be lighted. Decide on the footcandlelvel desired.Select possible lamp locations-places of concealment,vantage points, or pole locations.Choose a Iamp type or iypes suitable to rhe length of beamrhrow reouired and rhe foorcandle level desired. Use "foot-candle Paiterns, Piges 6 lhrough t. as d 8uide.To calculate th approximate number of lamps needed usethe formula:

    approx. number :of Iamps area in sq. tr. ^ foorcandles desiredinilial beam lumens of one lamp X UF X MF

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    PAR and R lamps, because of theic well-controlleddirectional beams, provide distinct patterns of illu-minarion on rrrrfaces ar which their beams aredirected. The illuminatioo patterns their sizes,shapes and the footcandle ralue distribLrtions wirhinthm-are graphicallv described in the foorcandlcpartern

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    I A - Mountlng 0istanceB - Aiming l)istance o'lFB:

    12 14 16

    12

    rhc eriJ' on " hi, h rhe parrc-r' arc driwn

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    AIM II{ GANGTT200w

    PAR 46NSPvtnW300w

    PAR 56t{sPr;nt// /W-"

    500wPAR 64t{sP

    AIMII{GANGTE

    300 wPAR 56WFL

    500wPAR 64

    l,t, t t

    o'I A - Mounting DistanceB - Aimrng DistancetFc

    I 404I i2 16202428 0 2428Distance "B".Feet 32 36 40

    45;l+B*

    12 162024280

    2

    36 40 44 48 52 56 60 6460,;

    i} @I''. @i'''8

    I300 250 150 lto t00 75 50I &ilr'*". ((65"''rP \S1/

    *---

    40 4 012 16 20 24o'll 30'l

    0 4 812160istance "B".feet

    0istance "B"-Feet0242832364044

    16

    12I404I

    1216

    l612I4,t>'zl,r/v/,/ 12

    t6

    5FC

    =100 20

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    (See: Downlishring Larlrc or Elonsared A.eas. Ps. 5.)For unilo.m illunrinat;on wrth lighring .lstems incorpor-arinS PAR or R lalnp\. rhe \pa{inA herseen lamp. murr beestablished wirh respeca to the mounting disrance. For example,the center-to-center spacing between 15O"Eart R-.{0 floodlamps should not exceed 1.25 times the mounring disr^oce(see table, right). Higher footcandle levels can be obtainedwith the same lamp by using closer spacings rhan indicaredby the SnacinA to Muunring Rarios. I niiurmrry is .arriliedwhen qider \p1cing. dre u.ed. These 5/l\l r.rrio. a-e JirecrlJapplicable in systems in wbich the larnps are aimed ar 0'.

    VA -)A

    30R9075R30/FL75R30/SP150R/FL150R/SP300R/FL300R/5P500R/3fL500R/3sP75PAR/FL75PAR/5P150PAR/rL15OPAR/5P

    S/M RATIOS,7

    1.15,4

    1.95.3

    1.15

    1,15

    ,7,3,6535

    9OOPAR46/3MFL t ,rooPAR46/3NSP -'o..r,

    .35 ,7,!,10 .1t.1 .8,t.1 .l

    1.11,11,1

    300PAR56/\vFL3OOPAR56/MFL300PAR56/N5P500PAR6rl/\vFL

    500PAR56/NSP500R5!?50R5t1M/R8591 Two S/M larios are shown {or 2oo-, 300-, and ioo-watiPAR lamps. These lamps hale ssentially oval-shaped beams.The smaller S/N{ ratio is used when rhe lamps ar so oriented(see Page 1l) that the short axes of the oral-shaped beamslie on a common line; the larger ratio is used when the Iongaxes are on a common line.

    A - Mounting Distance 60' iB - Aiming I)istance

    * ------ *-

    300 I^

    AIMINGANGLE

    200wPAR 46

    MFT

    300lvPAR 56

    MFL

    500}vPAR 64Mrt

    t6 t6 20 24 36 48 320 24 28Distance "B".Feet20 0 4 8122 t6

    t28 goztzo rsa E ';/li.torc,l fiii)} * ----,; w//I

    12

    8 eo soao4 yz-jy. to rc' (l$)ov8

    50

    r0tc *----I0 100 i5M

    12

    60istance "B".teet4 0 12 16 20 24 28 32 36 40 44 36 40 44 48 52 56 604 2812I40-4812

    tc\ib,9-H

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    20,000

    Thc variety of wattages and bulb types avajlable inPAR and R lamps provides a variety of bearnspreads and intensities. These differences in bean]spreads and intensjties are apparenr in the candie-power curves shown on these pages.PAR-38 and Reflector (R) lamps are designed toproduce circular patterns of illumination \r'henthe lamp beam is directed at right angles to asurface being lighted. The candlepower disrribu-tion curves below represent rhe distribution forhalf tbe cone of the circtLlar beams.

    PAR-.ia), PAR-56 and PAR-6-1 lamps are de,sJgned to produce oval-shaped patterns ol illu-minarion qhen rhe lamp beam is direcred at rightangles to a surface being Lighred. The candlepowerdisrrjbution curres (Page L L ) are double linecurves. The t*.o curles rcpresenr rhe caodlcpo*ertljsrribution on the long and short axes of theoval'shaped, beim cones that the lamps produce.'fhe solid-line curre represents rhe distributionon the iong axis-

    t8,000

    16,000

    10,000

    - 4,000]3

    2,0006; t2.ooolf

    8,000].o lco

    100

    10

    20- 30 40 50Desrees from Bedm Ax s

    500 w R40300 w R40150 W PAR150 w R4075 W PAR75 W R30

    30Deerees r'om Beam Ax s

    8t0 0 Ds1M /R852

    2,000

    t3 4,0c0

    5545

    4.r00 ,l"Il\IIt SPOTS 6,00015 25

    Des'ees frorn Beam Ax s30

    Deerees lrom Beam Axis

    -_l-=:-B=.--.

    \

    750 R52

    8,000

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    POINT-BY.POINT (A I,(UI.ATION'To calculate footcandle values from the data shown io thecandlepower distributiod curves, the followirrg formula is used:Candleoower . ^ootcaDdles - :::j:j:.I:-ij-- ( Losi oe of ao g le of i ocideoceDistancez

    For example, to calculate footcandles at point "A" in thesketcb, the clndlepower read from the 10' lide of the candle-power cune for a Iso-watt R-4o spot (Page 1o) is 2800i thecalculated distaoce from rhe lamp to the point of measuremeolis 10.15 fet; the cosirie of the 10" angle of incidence, radfrom tLe table next to th sketch is .985. So, footcandles atpoint "A" are calculatediFootcandles - jgg x .9a5 - 27 (rounded oF)10.1 5l

    To calculate footcandles at other points, such as *B," 'C"and "D," follow the same procedure as for poiot "A." Theaoqle of incidence and the distance from tbe lamp to tbe poiotof-foorcandle calculalio.r rary considerably. depeoding oothe lamp aiming angle.

    coslNts 0FANGI.ES

    o'1o l4s- tat5' .99o I 50 64310" .985 | 55 .5T415' 966 I 60' s2A .940 I 65 41325 90o I r0 .34230' 866 I 7s 9s935' .819 180' 1t440 .166 I 85 087

    rso-w R-40 sPor IANGLE FROM - -4-BEAM AXIS+ I {J"- // Il" $"'f',

    ,rrouo*,"-/-f I/ii,'ry;

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    tMouDting equipmenr for PAR and R lamps is made in manyforms. Some are adjustable ro provide for lamp aiming. Apopular type is the swiveling lampholder that can be mounrediD many ways, such as on floor stands, at ends of conduir,clamped to pipe batlens, connected ro junction boxes orspiked into the giound. There are several equipmenr rypesthat ar designed ro be recessed in walls or ceilings. Someof these are adjustable for aiming purposes, roo. Ourdoors,protective metal housings with clear or colored glass coversare necessary for PAR-.16, PAR-56, and PAR-6.{ lamps.Units incorporating metal housing for the prorecrion of R-4Olamps r:utdoors are also available. Skerches of a few typicalequiDments are shown above.FOR lhe M05I SATISFA(TORY SIRVICE ond SAF[TY...Tbe l5O-qa.r PAR-38 lamps with medium screw bases, andR'.lO lamps of more thao 150 watts should be used only inporcelain sockets.

    All PAR lamps wirh side- or end-prong bases shor-rld besrrpported at the bulb rim and are recommended for useonly with heat-resisrant connecrors.Metal Gxtures or liquids should no{ be permitred ro come incontact wirh the glass bulb of any lighted R-.{O lamp nor

    made of heat-resistant glass-bulb breakage may result. R,,10Iamps of some watrages are available in heat-fesistanr glassand are therefore less subjecr to such failure (see table, Page 2 ).Housings for PAR and R lamps should be designed to pro-vide sufficient cooling to iosure agairst exceeding safe oper-ating temperatures for sockets, connectors, wire,and lamp parts.In geoeral PAR-,16, PAR,56 and PAR-64 lamps, when usedoutdoors should be protecred from wearher by glass-covered.well-gaskered housings. Exceptions may ofren be made in thecase of ihe PAR-46 aod .56 lamps when they are aimed belos,,horizontal, and are in shekered locations rhar proteca themfrom driving rain and snow.

    TARGE IAMP OEPARTMENT

    CITYAI.BANY. N.Y.ATI.ANTA, GA.aatl uoRE, lt,lD.EUFfAtO, N.Y.GTIARLOTTE, !r-C-crltGAGO,rI,t.ctNcrNNATI, OttIOCLEVEIAND, OHIO .DAttAS, TEXASDENVER. CO!,O. .DDTROIT, Mrorf.BOUSTON, TEXASIIIDIANAPOI.TS, IND.N. KANSAS C!TY, MO.l,os aNGELES, CAtrr.!|!EMPIIIS, TENN-

    SALES DISTRICTS(To Obtain Sales and Technical Ido.maho!)

    (zoae.)A E1k Streei 736I E, PacesI yBd.,N.E. 5r40l Psrter ad. . 2?438 Delaware Ave. 2IOOI Tuclaseeqee nd. a165 No. Candl St. 636 E. Iourth St. 2129 rO Tall Ave. A6500 Cedar Spriiqs Rd. 35650l E, 44th Awe, 16l4OO Bool Torer 264219 Aichmold Ave. 2?3333 N. Melidisn a2OO East l6th Ave. 16274? South lviall Ave. 22ll?9 MoGLead St. ?

    ctEvELAt{D 12, 0Ht0SAI.ES DISTRICTS

    (To Obraitr Sal.s ard TecLdcat Inlordation) CITY

    GENERAT @ ETECTRTc

    3-4447CEdar 3-541aCIrcl 2-5?OOGArlield 73a I

    Dutrbar l-2460l,Iberty I l?O0Dudley 8-4611MohnwL T-7595WAlnut 4-5634Gnand l-3564

    ln adclitio. to the Sales Distncl He.dquaners cihs lidiod above, G t Lamp sal*nen a! resideht in91 other cilies. Consllt your telephone clirecrory under qereral Electric Conpaly lanp Djvisior,Generai OIlices

    NXLA PANK, CLNVEIAND 12, OHIO

    MILWAUKEE, WtS. 5300 N. Shermar Blvd- ,MINNEAPOLIS, MtM.. 5OO Shn'on BlvdNEWARK. N.J. . ?44 Broad Sr,, Roon 606NEW HAVEN, CONN. 1a5 CLur D St.NEW ORLEANS, LA- 4800 B.ve! Bd.NEWTON UPPER IALI,S,MASS. aO lDd-srflcl Plc NEW YORK. N,Y. 570 Leilsion Ave.OAKLAND, CALIF. 999-9arh A /"PHILADETPIIIAZ PA. 3 lenr Center PlazaPITTSBURGII, PA. 234 W. Canon Sr.PORTLAND. ORE. 2a0O N.W, Nel. St.RIGHMOND. VA. rOO4 No. ThomFon St.ROCI< ISLAND,ILL. rl foud! Av-SEATTLD, WASH, lO W. CoDncticui StST. LOUIS, MO, aOO No. TwelltL Blvd.TAlrtPA, FtA.. 50s Tw.sss Sr.

    9 Hopkirs 2 346013 STerLinq I ?2462 MArlel 3'3953l0 locu3t 2'942864 DEcalur 2-620022 PLa,a I l3l I3 LochaveD 9'342219 GBali 1-9050]O CAp ol3-210130 Etqin 6-23a5- a 3405rr MAir 2,aoal1 CEeslnut 1-49202 2-Atr5