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Ie 4nc curflc 4- Armpe re " Ors 6 C rvtoles ImM AOLU CcA 1Je I IAlen SI ~ Ihere cLact aI 4I2(yb 50pptcVi4L /O A ale rFdian (2/ Iradtia 36 ) cl r FGerc I le MJITV.14 s~~ercrdla~~~~~t s1 rAj ( A /- r ma;v &, ' 5 6 i14,Id c :5p Ae ; 2 ,S) riLCJe mdatscc rl o rn OkeN arc IC4tf r, 1 9 , raT .a C rae. 1 s4er&J 1_- (,)he A : r' 3 (561sJ ) ,l sr per sp C Ot -t4 L44CfJ tgkClal4Jf roeU4'4 4# all r A r,,, zu 4 41 dVs 4 -x r. if L4 L 9i-ktlL la C- sI fASB 6aVj 4X122 s3r* ,i1·A · I C" cL P7, 1 , c1l6 ti C-a'Ia ble 5U r, 17/o 44v/--c L&veh6,~L) & aIlb6w nn~ C 6,4,'2 ; -7, , -IJ/U12LIO etyt-Jr 1 ~~~,;awvfxJ n k L 46Lc , 4 7a J6t fatrdl,%4 k Physics Radiometry Radiometric Units Radiant energy joules [J = kg m2 /s2] Flux Radiant power watts [W = joules/s] 2 Angular flux density Radiance [W/m sr] 2 Flux density Irradiance [W/m 1 2 Flux density Radiosity [W/m ] Radiant intensity [W/sr] Physics Photometry Photometric Units Luminous energy talbot Flux Luminous power lumens [talbots/second] Angular flux density Luminance Nit [umens/m2 sr] Flux density Illuminance Lux [lumens/m2sri 2 Flux density Luminosity Lux [lumens/m sr Luminous intensity Candela [lumens/sr] - , C EI~~L~n~Is I ra Aa Ot rtC,.. 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A IAe_~o cjllk i I' c/ b L; IdJiA b lor i? /_ / k / F F f,I/ b I II r/Ij ,t Cc dco5'k 1V"'- C4. (e, ca ICIf itII b rT un-- CA. In canCL dmlt, It - -* , I,,)w,1 I, 1f3A w 60w x 2t 3Irm0j 12a | ,OIo 9oLwc Z rxo/4t rlo( c i :2 IlcX bes f: j: 100 / 2 ExXs 1m si I Re e-IVer Is no; J ILCClt frLctk the sooce of I, t 'I E I cs RZ c oo j Fr: I. sin--c'q IInkk S lAt rcad SITS (or rBAJ !) / 1 ) / / / · ~ 2. ;c .- r .e ,, / / /it I * - -10 DX~Aslmm Source of, 4 ne 5i;e io direcI, fccl,. tkA line- orsip Ylheie 5czrcce cJ rel, er LJA (TR csK\ Apl ccr ,A .1.5. . I,f P,ketI, % IA oS IUmiAO-S C ct rleflne Uie IAlength, a5 c F16n oP 6K ~SV rs e anj 6h1UIlhJ A3b5, For 1,3fl 1XIUM - Ii Liskbllxq call~lm-~ p raAce I 2c A sireRe l p I. /O' I 6m XA SX / sun 2. M I.Crrm +L- Gri-Zd-Al/ sW, far_.01 8M If 0,3 / -o L L JItnke-e r: o. 1's O I• 3. '40 cas s/-6.a Is ,c*dL 6 • 2 E 3. Lhi,cS bas IT wJlf~Elec/, 1 4 L/3g a.CaJclf : I Tcre. 31 e nyor - bra th ( rumz "/ 1 q e0 nee'ss 'sm ore cThrckA soeA ax ;Il ^MAnnce 6. IES S.ec , lueL r, c e Wet ryeS fit Te C-FuSe-S a4J crilie-lrlsIcit l eoFroX Casor os4 KAk A EQ& K-57F aO czDu C, 6AJt oCs I-IS R I tr\6 re fiec,'iLS / i f // I -her arre 47ASM l1PcSr7 reiC, -' C SbI e go SPC.LLr A per el Jllse so rQe Cca4Ln, L clcwciaCCea 73 cklucs) bt sni reck pl (or Ar-e afLd'J cl cLriaL-LS rw4 LML6r- ax -50rfce 2 1X2-a L c-C d Ike bas c I kzMn - nc h Ol cCll ElwcLF'A et I (., $ CUL LL A dlfkpLr Iynm M2 CUL C (A-~~=c celc_O ce1en4v 6 -Fo-,, Lc LLF =cjxi I-<, -LJ LOI The cfc'cCfJ Vor LEr I/IlClhe V)V d4flisr [ l,)WLAUJ fiW,, irlcLjAl-cl Of I. Asarprc tAe cU/4 2. MuvlIcIe pd$ets 6F rh66 "··c�C; pl~e C(k ft Soruac pFpeC3he, r locit Si(slV, lentp rl/ture Jpe) TROcYM_ l4Ae sunGL re 5 pfic 7 i)a (MWY( Cl ) n6ao (RCR" 1h MMJt; ce,/,,~,~~~~~~ cV I I r~ o>VI KCK 5 (I +vV\Al Verticc Surfce areac k r :z --Pta s r C acrme s MnyTiaar eulvalerVJ re FC(i:e! ce ofA He Ike I) F ke Aei 6 O Ie rec'rvs 6 J c4Aii 6aCCul I4 &.hA the sor 6ces h UI\e Fl fc 6F kQ•ee Cavl Les. Ybmz,61: ITh (LI I ,ssEGIjr LLF Jc6 Arl lanL ckpCJ J eclra4Sa& Ovr- hiW, jllg F FCClvr dl'rr t-OVY' or~( e i'` 0 7 A ]yeccjl L-LF ,2 -14. EXacmpiee T)C513r Ke IgVjis 1r a Cla s rrnz~c lk5 h.A 6 nA.- Y 3 w-, fPC7 80,1 "P W : J,-f : lom IA-ai re .2 1464 lars&ift lalp r cJ 31Z, ,-ikd InLen, echC ( 80 Im/W ) Take 5as 1u Ill I Ac "SUM e tke L.rLplAre l atk 8I cv I 5 19 3 -0, 8 )Y (S t d) 2-6 RCK I Kc IR, 0. 8 0. 93 RCR fvFrr fadvjke.L 4te, PF -( ), L OS9 p0F : -·) 6)d t aljn,cC f l I 11ler or 1, CA J('NV (Ct,: 0.61 k LL F cl, L calcWIcL F;ai Jma46ciAt L lgye AheK ( J se -ads -7 ,,r IA urdoc k Wth LLFr o. 7 I ; (&s. dle bLcm ecuA6l,. solvm, r E-A s5o0 I 90 t ,7 CU LLF 0.61 x 4sOOD 1 - 105s,400 1I 0.43 Nwu evJ df IoI r(A'Ct res I&,~- 46D - 6. 7 o, 316 cO wLik 16-17 Fifvres, spacedJ e v llf l unckrkmCA s A. L1aI n + (NMurdc& cpl->y9) 2 Sn c2arc 1ky ~3. L, AsFuthk( s NurnylLars rrmclrmkr -~ -cy Arik s 5lr;ce- ;un -L 1 IVrnk "1 rcZJ n Crrd I. " rr toljccIce v Jlr (P AiA ,(JLr/ 3J1tke sonr IU0 Ar,6uJ C Iob61/V I, cajL Ol6ay, Ia/ ' . Irn M61,e delal I -- 5rJ o 0AlJe Eo-rc ', h1Lnt spAe re 1377 VV/M 2 I2a7 5 ( i27, S6X 1i,4/) Ci 4 E 93 IM/\4 -17 N\wlcx) SrpOCJr Ecr W5l\S u rfce M L~zs+ OfC0Ld Ln+ y JCLA/V 6A 4S 1I FT9< C,lo Os eKf z E I rS urFcI EcA/s surg;e Eo I A - S . F R FS£glIe c CleValc Mt c urn oAoCIe orii~orl crC4leAWd 0.2 o C, = CLIrAO-h c l C -xIIIaJIM i rL, cx meL ede Iia 0 Asles h 103 klux 40 92 Oo 30 84 70 o0 69 too I0 so 97 0 0 17e b llumactc. rFer the on but SlWa urCis C. IBri;ZJ'ALI I ( I3or2 Esul\ son r ,,* M Khlera A Is S6lcar Pe .I 1 i a IcUd e LIIC \/ 1 I sed e)\ EV644 Esun osh s Y -I / / F - L I i I PIav& I I I'K -18 Son eelJ TheC all, LJe cMdI aiUx hF the mlalhne-e JOGICixak d rIe- Sece1durOCh cWI, 9 C AhaIkelt,tle A S IItHvz clJx kaz,J 1 eCJ) CLzlA4i o½" I4\e At solar tke act e6L IACr criAhkdl Isel1StYl c ictJ For ,,, Fkc sol5 1, I k' 90- L umm-Cer solslccQ ( 6/i' a-L & 3/21,9i ) ,- E:Cvl A6rY h so-L- 23. CL 1/,1) QC(aer solshcc rd 11a I ,16 a. l -,J I,, 4,/kk E k's, 'I"' 23 ,- rtxe -' ' r ,t,, CA raepecf t1--ez F AL Cf I-- F arv rJ He Sbru. to - I . son -"rik1 CLICCl" n. 66?y4,sufnan t.4,j,4 it p- //U· W W. " rh 4A xWj w . a e. . arMr oL,-IPK eI b/ Moe-~Zlre-s -I orwz Isi cA I.. ACJ I tk e g4e K: ctLY n5g 4T eA- ( I v Q ri quLAirne( & Ihi We A&a1~,111 ,n 'J 4,..me - : o a ^ so sce K cos L om coS O 4 -IthL S A L . jakIVI CaCls r+I,e C4oLiAC', ( fl1 6 ptA 4 re J10Jad e o 4t L4cI W k at WU6So(>C pAkc 1fjs4 Sult awd & , f~ , S e A1 - - 2AS ' %- 11z -) --1 -11 3;o (n- 81 Jay leir-5 S: 23A5 5,, (3 ( 2-z 36s, (t)(-2 tk n of noxL 4 c Ice C4 i1 , :,Kca\-A, \ -AC I Jllpllj d. z s ( Cao, yk 03UC, Frnlac rF4ag 5u/N 's CLVl Mt4 I cale Slr\A:- 05 5 Jrf e_,3as t'1 £JO~i 0feoL aedJ fkas (Zelu-culzm I u-6 tsJ, " WLII I~ Ilg;n LcL~ m campLtie "CL 41/7/i. 438, aia",- tA2 e n 4"V L Ld fcaklLC J &2, 4 60 rrolJ ~s~·bpaC- ST; T ET r AT I · I teo eoxt L t ET, Unnv C> fwZ,A L, ,A Z (SeL -" I ~ nU, q'LJ (f) h;T - LrCe4, c,4~rL* ztln4i~L (7 w -Ps E~~~ sa o-~A--, ~~Lyn -It'ird.; dg~~eI, 41. eOL/sforgcrelA kXc 41, fo 4 E g,aE-vr dre C mn E, " 4rn Lfarjcus Or p 5. 108(10,000) 7- r- 7- W- .99=== :2!!! 96.8(9000) H 86.0(8000) E, f g 75.3(7000) 7 - : _J Ve-- i OIC --- W 64.5(6000) -ir rv 53.8(5000) Z, f - rq . 43.0(4000) r I i 32.3(3000) A La h" 21.5(2000) --- Wv O-- --- l ; V75- _ __e -- K' ,-11 -I ~smsm~imn._ 10.8(1000) Y _ n := = := = N u 10 20 30 40 50 60 70 80 90 Solar Altitude, Degrees Figure 9.4 Solar illuminance. (Source: IES Daylighting Committee, Recommended Practice of Daylighting, IES, New York, 1979, fig. 37-A, with permission.) tIAe II 1-r a EVo' W'44(, IvICLnce FPWK & \)a al Sorc (, lt ! or cr SIUJL' tP.ij-oJrOrrln is s c .0C) -19 S abO~ll t\&sky - ovrcoJ or JeL ? Almospherl scic4isL kVs nkcZsorezcik sIy Ivunrcnance rca 4 d^. j{L.cwctdj )a uhIvalce rl wlV jIAa- ai v (ae alzzcise, -ei nltR). L - 2S- 3. 0 L Morl 4e LurcAnce, (A reclveleJ Ca "n+e en.Vt&.±aelI lumlhamc~e.La r(A -S.L ' U,,Se d- Si le-\jcJL.4-e, c( I-f cvS Is ,cG|d1 VAAtyl(\~ictce Fur o, Ven4Ur-/ cale. aJ 4 ) nt equLvaleA sky lurAIAtACZ aA 15I CS piy kor-6rz lialmtceA aE3IsprDLte_ It QC4ImI ,,,,,~dIry me /ecI~k~L 5b- g h a L ~ tker L (S Qa I-/ - 51 klne VCAIe4qulJa l FIjyalI aIlxLtct(cQy C Lc t c F-jloa1 s Ah0ft C r a a Funjo-4- 6 S610r 44wetcl~, k I-' h gh&T ab a ear sh/ ? iw, Jt, as Lvio Icss ll O clk e. (WLIct 3018 ?1% Ad IMtA 4 1,f- Sy VlUnlAnAe N)QI'lS 11J4told ftar a ¢Sa .e jvMYnanCe Aear Ike iorn nJ Ike Lvoril-? A-8le l2 ,er +641< e xIet I IAaCt c ar_ ,"" IX A4n; NCr anll j A 14 is Iv>&lce hLo be dc l 6Ikec . luall C u ~,CC-p6ss J'ez,6,A d]O, M k^e [. 'CK sblr 6jae 4Y lnilfahl cea LM i laCj 424 gncL P cltg. -- he curvc-- 'CiC# IVM c44e-&1ll JaM Scar. II i d IE 10 0 4; 0 10 20 30 40 50 60 70 80 Solar Altitude, Degrees Figure 9.6 Equivalent sky luminance-clear sky (no direct sun). PAl*. 1 efkcr-.. 1 Tke, horwzmALl 1JtIAct fu.r AiSn a dax k a 4 16Lr SOW Co*L padlJ a4C L 6 L j4ii ,. ...... Iw i I 5t I,UIUJ r -I le Iu sunaJ U I Ut I UUUU) 0 x = 96.8(9000) ------Z;/ C ear Sky Dlusr I, _110--_ C . _ 86.0(8000) .. irect Su irect Sun 75.3(7000) 7; *C IJ .: Ia 64.5(6000) 7Z 53.8(5000) a 43.0(4000) /L 0 32.3(3000) N l I x0 21.5(2000) -Clear Sky_ ;0 5 = l 10.8(1000).... f :m P _ - l. ,. n ._ _ U.-0 10 20 30_ 40 50 60 70 I80 Solar Altitude, Degrees Figure 9.7 Horizontal luminance-clear sky plus direct sun. - 1'9F- C. LumQn meTJOA or slkyllKDs ( o p~n 1AJ , NJ oors) ihk ckpprLs fs Cnr er y) iec ,t1l l 1t{ I I -; I E Wobr~oi z x Kk lVm AATA on Wpesare KLA, Jilizalimv coe-Fic;en\ 1I f- lss FcLCLr IS" 4 l IkQ adboe ido) eqc rgCl An CLS tL : CO L\n E worLplne A skyIlm-t x IACL Km Esun t E sl A vorkpla/Je - 20 IUx 1OU 4AJ cot \ow aLt Sa e ace \s6 A hSbOI "Y ,tJkLJe oaL cvr sk\~ ,' k/ ELAL SLIOD :- 0. 01 E S-o"6 Eso Eshly 0~' I~mVL, al-l oo Sb1,3 s nZ4~ nor needl Db ebit Ka* J K Lt CA,e x I I< >I RsC-U X( I Rl -luzv remhy coeWcicl of U lbo%.1 4 -Ft 1 rne+ sleKav Taks9 &fr [-Icto* ~too"Ao-c . x ~)4 Kv1L f o, odc5A- Va e 60 0o7 1 princs iy ia -21-4X i ( /0, -- I, YrcJIcJ 4'ewa31IZacJs k ) d. Lon-thq- (cS IoFiA1 j - ELmpirloc scuIWkxI| -IM ancAL IYAirce, pcirW IY\ Ckt rZmvm - Aoor\E gzj a J Ltuhse l& - Keuiret S p4rede e4J'calua" I+ t c_ &)JalM The -5u aaJ sy, a1J PIm tG C~M~l L FMYK At S)~y cankA zun 6o c,'vc, se J .1 bi rLC ( Frt s~n~ zL q rcin r g reS u 5 Flsurezs LnkfS X4m-& ins E_ :fr1 E�Sq I I E, 4 M;'st6% / I f l E 2; A V E sp: % C-3 , K l< r^ -!t3C EY - I SQe Morcdo c,-z KT-JT- CAREUL ! s- K awJ C>- Adls 16 1t . tvi os ~- c~ir R1t runi C uJillZ6110, Qj" 6~el d rmZ0, 6dk ovh 4-JjR I< ac,I ,L VI P 1a4 e'I &*- mzyx- ke l~u 4rij/-ji At SrCALIS a LA cdZurS SMALL Cs' 1K¥ cAA j cc . K, CIX- A TS c _ _ v Eve, CL ac (,)Iml xi-)LL Cs 0.(01 - 0,02 or3 c) am I 0. - I ' K , pcl4, Jl F IcLYv(Af 102,AL)cIo t)IM.C D4A kX 102, 8O eb saw I W% ~~~, co 61s, t) 120 -F Esp 4- L max (-Pt A\ ' -6ZI -PC El''z lq 3 0 3 Z E[r.'%A (PtC> H Em.2 Cal zA & ee rm L0 , 12 / 14 . If &),cAmt r1mv / A.A T ars,C -oc-e elua( fke,&e E-,U t ""'A--7 IkIrwfbLAf:e q, i: pObJa, , tI Co-7e- fI ' 96o,aCD :' "'- -- 0. 77, Jr c I aikV r, XI, LE9,L 4 0,77. ( 3rlt 1 En ; En I Cy -AI Km ( CS CK'S - EJ ce K> 5IeA.s C3 R IK w 2 1-OLeggyV~f4i c b i ric4 I - anAJ yl/c, nol enmpi o Cpl ClLL (53mpea4tS yA - Du 6kYNL\/ fof LbdlLs5k obkc hemsspkc E poJn zrr E em..^ smm v u aon 52t heintsp e thls cJlo s JL-Jtvo- cmJ ppC4, IIA-CN Me bF ha, rhzre cpn&xA rl -J-- -,e T3F SC - ERC IR¢C Sc epi s £4) al - t - I I 4 ) im aJf ReL7 rc4 1" ,2- ------. L 19 Is t Lt Src ptcrohuoL to e lawer IcZ,cr'r Z)fl f,L Wird&B rv,, 0, 1 fD 1S % Sc dc Asb 5T~ C Ls5sh6Ml. Xtcln Fpc tssel c lt)ht4lC( 6 AC 45AbaA lb - 2z 1jf heSFkI JIRCLA 1L ha IF o sc ~zC ,, A,,Zgdc &Llf Is , afLcj I cf> ,f ty FtC K Icre Jl/f le csts are CCWAs a"iOtatce, pVlerm4,,tcz atij /r cdecr s I,L VIS ,I, 0hiJ VIl -Mur ssu. s poF /ra C, fs~S. /),, prec- VISOVl b IsCert ,. tOAntcolotr alo a * dlraclt fOF ti ½ rJlalJers t prlj ent 0ens4 > 3nhtr "onk occurs &hen pupi) diceler a r nrnLQ0. 14.- % Iris tmmr 2 - 8 V\. Fu,,i amq4(zr F2A. C] I M I take 8 twat 4'1eU l0*IAtcvCZ-a 'ar"a 4 ]ADOt IU aC j 1l M t-If '-C '[ - a. JIM In 11-4 1nle ri 6f Io CM z I 2. C Ilihr coron ISca)efk fCr of. 1i t& In 4 b lens a 1, I 4 anroarLnce isbI 11 Ajij Qky~m /J IOm)anVcc IQ.s /&Z - ore prorouJczj fr small sorces 2a 3. Sj6Ort. Scakerm, df 1)SP (iforrz, IQAS, and Accn. - also kInown di4lls1i/dce xj ve-l lA IV1n IAd~te * Scarecd t aJJs IvMInCce OPLsz aSl bacgmvvd., decrcaslg ckdmst -~ lbg S ,TI 1II a J ax, pvtJ re ClK lt r cCLLse ofteTcLLcJ csz 2. rzc Iclare nl4eJ aLbvOe Trats I \ 4 CLJet Lkeys D Ls com rcrr 1. -ecc L - ce Will n cO7-slar z. bl'rect \V/ L&ulI Co or arj b Ire IJC; / r. ·Set m4rJ-ocJ ckcpker 8 Feld Iur inan cje Iurli ar\ cc aCgas c.AchI hgre zercCsz Gave3cstr \ileedvieteL- Lc c : 1Z I-k1 L.~WH i L j-- Lscos 5 cjal - A c~ t - celling , - s oufrCes -5 r6alc aA/ - ok FellI dorvl 1o, o-6e o -f 78 Pt I I I I , I/ r tUOr a sA 77ve iU^8Ce at Ilre ppOs I -I V Sua I -- IThe lze 4It ac garc source Ap sI] '? I2 t /2 8 A o-&6 A l ) rr, -L· Q s re c -vJ Emp-r IiaI 1 , tkt glara, 1Ih solLcJd &ale Cc ao-ykpllcdJpei cJaxC 0. 2 0I zoAq cJ 1 1.2 61) - 0. 7 5 Q o (steradians) -3 S ov-rcz lu ' rIAtOncC w /Averccz lumrinaAc of tke Ilare soupc CA 4e, alrctda. fseke d rert. If I is i-e ImrIeAirz Le(ASR [/LczrJela i-abe Alraclm 6v dbtcrveron&JA Ap +C }DroJ 4 Aee 10miaf-C IA- t j I re J, Mt L- Arp IO f;T a, ¢CQsource F c,.& l ieTEqI~flore .~r ~_ q _ VA o.s LQ pFo-44 ('Aqic 1',4 ca rc 5 CASLLII #')4 LaJ t CarQ 1A 'JIM2 -4 4anli ALj clcrz preeasure : val oF1ourcf 1ilvWha^GMC es - SoSJt s1 , badA c jJA2 pr I - - - cnrat aL diSJcct 4Or 6J aura,6e obScrv/r 13rJle" co4Amf - c:zat Luiv nc C ( VCC) I 1 a A 0I w (steradians) gure 8.22 BCD luminance versus source solid angle. Solid angle (steradians) Cone angle (degrees) 5.0 78.2 3.0 58.5 2.0 47.0 1.0 32.7 0.5 23.0 0.2 14.5 0.1 10.2 0.05 7.2 0.02 4.6 0.01 3.2 0.005 2.3 0.002 1.4 0.001 1.0 0.0001 0.3 Mluliple soarces Experleet ncec de IVn -l,/,4ar re/lwt,?54jp ,een glare sansoacra SOVUrC Se aJ. -Stdy wig 2 10 observere anCdJ 48 1 l4A cCIofrl 1 s0 M 6 M M .. t M, Bi~,4Cv 3)Ctr r9au lb( R Z,(t\-,l 4 ) 0 - .0914 n lJ,e r ( ra\e nto J 15cO/Vfo4 glare evaaIlJ-1Jrt/, tI s op tbFobserrs rvAFr+ r~cb6 I1 1 (\I p ) 3s44 1PrLb1A-ik0 ClCe) 107 obseva In 3S iyAfg11 conJiit K 100 k/ Jlk VCP: t,, e. K : 6. 374 1.32.27 .D6 ¢ 1ES Fg IL r cr,I rm : mce2 Thke 74 IIC'j Al 'Hi'm, coriJ JCl0jA 1. VCP > 70 2 . RkCLAo of al/vrtu { -A, uolote IuIA i^a/ r c lrmalamnce < S c als o& 4J-r6 ,5, ° 6,° 75°dc/ S ' fimie lv/rA For bo lcnykwl5e ond crossats5e. va ir . IM ax/ rylory IL)M I a I M I unI laf CQ'S leCAeIc-6n ihAR-tzlsszIs C cdAJ crosscs Jo no xce Ae 11a')Iy \J&1s lcrkcl I A nle Fo lctsmuvnt L CCJ/Y z b -4\ 771 C0 3840 73g 2570 8 S- 16 9 IES 0 Ala or Jal!l 1 JI fl( .rQ (; u lk (A rmciUJ) o, LQ 6g cLre SSCLjozt 7 P F o . 4 4 IES IK PL c1 0-o #6r csnr+ aFstV F q-l,F,~P (lCA I . 0Iol,o 310-ra lajay V k l/Mvrcocl Is &h tLAO4C;I leclsLC \VCP uueftc I Iracor rproa, n ITariainc. anC Luvns. m IcrO 14 S. IES form I 'CA- Iead's a 3 ICL re Iyj ajqX .for 1, CT , sky sean 7h_ dc'I rea ,OF J Ls C.6m t lar dJue 6Ike agl/re JqX t,,,rvlh az te proJitzcL Frm. Ka GJ,or, ke- (or n l I ]ars 5ourc z Ia re MIn& K< Ft -0073oso L ptJilFeJ £ L, Rak slJ aryle J- +k sgFvrc-z, Cc,c r forJposOA &r ke heldd4 vlew K 1 10- lol,o 6; Ittj ex (b4) ba yllak~41,Lre T-) I 2 (CzL 14) 47or 2 0 3 ( )bserveA: reJer inlerance of 3g r Fr lv*sy,as Saa 1Am)v3tJloz, a fhqj Fx. a- cohtpacarble rCL C;oi ljkI sVkahmSl~ t , prLmdeJd ke 1am ndex 5,s n-btg 0o- a1is rsult arecs ith anoir, Wke-r a tie ccls/rr LaA dlata;fLc JwA 9he7v Cua , CA,,le T CacPC small a) s pacl 1 ,Mpaleem (F 1ixse, arJ S6Lcq f_ Ae. obeWrr b ISclkccll, c~p,,d; mt +e sly llr6,wLc-q. TABLE VI - Comparison of Glare Indices for artificial light (IES GI) and daylight (DGI) Glare Citerion IES GI DGI Just imperceptible 10 16 13 18 Just acceptable 16 20 19 22 Just uncomfortable 22 24 25 26 Just intolerable . 28 28 Consider a rw. 12 12 6 t ra4 Cicac . or O. 4 . 6Ol4NO IS L Tu#X perpeAJ lx Lr daStsce O• W1 Figure17- The relationshipbetween daylight-glare index andwindow sizeforsky luminancesbetween 1600 and8900 cd/m2. The window is viewedfrom a perpendiculardistanceof 6m in a room of dimensions 12m x 12m x 6m. Resultsforaverage reflectance of 0.4 (17). r)/II-"]: =2 fa L, 8.90 cj/ 2 I crScZ S F If lLuMac rs Sg 31 TsIO arnA cdorier Sorro,4uAJg1 - OTaslaAMry-e cnLrLer Str4;bcS 101 LS sf rcas anr SurronuAijsI20S 46: Ms '~InrAUr (excqpt 1F1 ecoraike) iz,~lQ,A+ toobec Fr MPssIs o -13 . I F lo:1, ker s.1 S XLpro le re }NL -- Vm JM/2 - h - - ct Seo 1wc: ,Pz o.7 MJ1 $S I/ Z~ L -- Ion ej/mz RatoO aL pMUl- tta 5S 2. t fee4 I\le IS ILw, 3 6,1 M l,,-/a-, EC 06, CM P Fc1m- 6 - S VNJ 2 L - 1I, OT J/K SraIOa 0 b SerVA S : ale as< _ 9L4k\1" tzL L4s / t zI ut czeA~ k - %.Ae hrR a Ilraxq, wb Ad At \iA TplellyS eectd Jc Ii# iJ a ekcA1 44) I11 vK, r, spaeeZt RnpF a Lwa~L Is7 I1 C a Ljfl 5ue 4efs IFLLLe rtn VJ Lb 7 ; aretkrm S[",JD s eear 1 pltrN I*" XK P? VI4e 3 OwMJ cavdV-5ta': LMA&WMrveles I 6L" aC I IAl 15,46x- 3~U~gI maize SC4ALN.