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<br />
<br />
<br />EXfER10R A:-':D OL.:D(x)R UGHT!:\G
<br />
<br />A hght ieve! of :: fO:.1to,nc;JJc::s is ~SO U:-:>es
<br />Lgher than the iJhm:i.,atioIl pmd\.i~ed by
<br />moonlight. These r(c0mw~ndeij rev~~$ ~=-~'
<br />bas ~-d on a 25 ~r ce;:~ refJec,ance, ....'fJJch !.S
<br />aveuge for rY?l~a1 outGo~..:- surfa2~S a:1~
<br />v~tltio!l. Ob'.'iou..;!y, the~e V2..ues sh~,i.I''-'i
<br />be ~djusted to t~ f;:~C:lfic ref1ec...nces of
<br />ti-oe m..tecia! e;-.cOIlL1,~ce~, l-c" e..x~'-lpIe,
<br />asph,lt free of din 1\.'\$ w r~fj~cta"c.~ of :-c;,
<br />~ut weD if one is JighEng an <!sph,alt=,j park.
<br />ir.g lot this wou!": ~~ mooli"l",d by the l"e!!e~t-
<br />ances of the parked automobIles.
<br />
<br />....nQther consloentio:: in the selectio:1 of i1-
<br />lumirutioo q~n!ity is th~ light le'>l<':!!s ,;,f
<br />SUf:rO\im:!ing areGs, If, to:- ex.ampJ~. a
<br />shcpping ce:1ter is located in an out!ymg,
<br />&JTJHi't:ted area, t\o'o footCd.nd!es may b~ ~~e.
<br />q~t~ lOT lighting the area, Howev!!f. if
<br />thiS shoPi-'ing center is :ocatea next to 8."
<br />eit4bHshmeni: i'..avlng flve !ootcarrd!es 01 :i.
<br />lumin3tion. s~ver. to ten !ootc~nales m#) be
<br />n~ed-?a in the shcpp~ ce:uer to 3i.tract
<br />.:\,\stomer$. A!$o, a~ p~')?Je be~ome more
<br />safety COO1SCIOUS, increased leve1s of IIJ...mJ-
<br />ilattoil' a!'c ne.:essary to promote a fee!in~
<br />of security. Where acwaJ seCurtty mC~Si,jl~S
<br />in':!uce the use of Dlack and Wnile te(~"'ISt0n
<br />fo. surve1l1cn.::e lightlog le'Jels must atso b~
<br />increased. L;SU3!1y at,o;j,( (hr~~ fo.:>!~an~:~;5 of
<br />IlIuminati'';)I, are suff:ciertt to 6~i:ec! the
<br />presence of 3n. inolvl.:!ua! .' for eXc3mp:e In
<br />a p.'! rkl;).~ 101, HQwever. s:;:m('....h~rc be:w~e"
<br />,; .n~ H.i fo.}tcanOJes are neeoe!:1 for pur,
<br />p:lses of loer.ufi.cc1tlOi'\, TJ1e reqUIrements
<br />(or th~ LIse ",f Cv1() .e.;1 te!evis WI) esp~.;: \.1, Uy
<br />in sports :area..;, ..re very ~err.anding ana
<br />must be h<!:1d!CJ O:1~y by e"p~:-~s,
<br />
<br />If t' 11 I , '.
<br />~ - /"" ~:.:. \.'-~ In(\ll..' R?:Clf',:~~,t, t~e 4tJ3.!Hlty of :1gr.l\
<br />" ; :::1 r,a way e:itat:;~h~'~ the qua::t;,' or a g;\t;iI \,
<br />.J / hghung mSta.:!,H!QT1, For exarr.p!l:~. an
<br />4..( <lvec.agE: J ilur.: 1:1.300:; requ::f men: of "fie
<br />~ \ fONc.U'IOle on c resldeml<l! s(r~et C0;l:~ be
<br />~ fl.i!Wi~,'j by If.,51a! ling two km lna.res --
<br />1 ~ \ one "ear eo:ch :r rne r of ~ht" b:o:~. See'
<br />~ f1gure 9-23 'l/ie .-::"~rage i1:"m::1Jn..):i io:
<br />\ \ the entire bJock m ;gh! b~ CI1~ {':;, b~! :n.:
<br />~ ~ middle of tht biock \.\o",j be .:e,mplereiy
<br />"-:.;,
<br />\ dark. ""hitC tt:~: corners ffi~h: -:eceivc; run'" i
<br /><t foctcam!1es, w~ wlli l:-ea, thIs :n the r.~)(t "
<br />\ procc-dura 1 step, "
<br />
<br />J\gJ.:n It Slh~U!('j I~ er ,p!'1a$~ed t!,~t ....e ,HI"
<br />t.\!~jn~ about mHlII~,lm :!;Ur.',l~'ilo,m le...~!s,
<br />and JS WI:' hove le,H'nC<! .:\:.r.t!!)\J1I1g stua~' 13
<br />aJ'4'ays re\'ea!1i'1~ ,hat le"c!~ re.:ommCnde,j
<br />
<br />--
<br />
<br />fa g~ 27
<br />
<br />1:1 the pa5~ \, ~re tOC !O\4" ~'Jr ths ad~G~ate
<br />t--,~rtQ~~a.e_-e of the viSuo i tasks ~nvo}ved.
<br />A!5(.', the '~uc"-ess of area Iight1.'Jg IS m
<br />..:~ne...:ng :($ ct~Sig!1 pur post and is al.....ays
<br />relate:: tc sa.rro",nding lightmg teveis. It
<br />1$ abso:'.1te;:; \J~~~ssary when recomroe!1di"$j.
<br />a pan!Ci.iT4f i"'\I~T of iI!I:min:i!1cn that one b~
<br />J "';HE of "he T'fa:,;:.. and P\lss1tilitH,'Y'fOr
<br />
<br />,,~;>i; ClOt..."
<br />
<br />A..r~ge L.i$'" Le..: -.
<br />F"'cQC\dlc~
<br />
<br />----
<br />
<br />D,' ve-In Re $to",'o,,' S
<br />yCt': C~ P:J''': ;tl~
<br />~1"I~'10"';:.S ~:~d
<br />
<br />2', S
<br />
<br />dr;ve-i
<br />
<br />~!O 10
<br />
<br />~-
<br />
<br />W::.~;~
<br />
<br />'r.]d o:"!ci ci:;~;~)
<br />
<br />r;., tc 3
<br />
<br />$""':''' '''9 Ccnt..,
<br />
<br />c:~~~ ;::rk iog
<br />tr.1f~ntt ,.:-'~iY'e$
<br />
<br />1 '05
<br />2 to 10
<br />
<br />S.rl!et1 ~Ot~e1 tho:\
<br />
<br />...;:.!t:'S' ,'Ole ~ ~
<br />~r f'~'::'1':"
<br />
<br />"
<br />, 'J~wn I,:ter.! Rvl'D J or
<br />
<br />...." ....iHau 0..':yin9
<br />
<br />mcic'
<br />coiJ~Clor
<br />
<br />2,0
<br />)2
<br />09
<br />
<br />[',2
<br />
<br />0.9
<br />Ot:
<br />
<br />1.2
<br />0;
<br />(1,6
<br />
<br />!~~O: ~( l":~I'Cr
<br />
<br />Flg,9-:::1. Recorr:me:'\ded In'~r.agc Feo!-
<br />candle Le\'t\s.
<br />
<br />L'g!,1 Let.,! - FN>I<oncjt~.
<br />
<br /><.....,.: .....~~
<br />
<br />C;.QN~
<br />(\ 0,
<br />
<br />\
<br />\
<br />
<br />.....c=-I"::lg~,
<br />;)C) i;9~'!
<br />~, no!1~ .. ,~C()""
<br />~r ~ho.<u: . l'h.,'dMr S ~
<br />61,.*..., ~\Jr.!~sh1
<br />
<br />50- :i0~
<br />WD. rliOC
<br />5000 lOc-'JC
<br />
<br />')
<br />
<br />,I
<br />
<br />F1&, 9,22, Comparativ~ LI~t Lctvel,;,
<br />
<br />'"'"
<br />;L-__
<br />
<br />~
<br />-_._.~,.~-,/ '-
<br />
<br />-.----
<br />
<br />... ----,----------
<br />
<br />r-
<br />
<br />4 r~.j~ ,;.....~..H
<br />
<br />c.>-P,,, II fOC~C~'<CcfS
<br />
<br />LE. 9.23,
<br />
<br />Ont> Foot.:ar:dl(! !~!L!mU'latjc:J,
<br />(Av ~r8g~ for Entire Bloc k).
<br />
<br />-
<br />
<br />=- : .-~ ~ .....:.._'...~, i
<br />
<br />1 .
<br />
<br />'''-'' .....
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