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<br />dtZt and dirt build \"'J) 0:'\ Lar'!''!? <br />and iuznL'\2.'~ ~ces. <br />~ Eft~,,'e lighting maintenance <br />can thus be an extremely impor- <br />tant aspect of mai."\Wning 2ff~. <br />tive ~curUy. ~nerLny ~ng, <br />this rmIntenar.ce does not reqiJ!re <br />eA"tenSl\.'e time or expen..~. <br />"Typicafiy, annual (or more ~- <br />qu~t) cleaning is needed, ~ \$ <br />replacement of ~ lamps ~t a pre- <br />d~tennined intm.c!l, based upo." <br />the rated Ii!~ of the lamps lMtailed <br />~nd the exwnt of use each yer, n <br />(Nme: The ~tiona1 lJghti.'1g <br />Bureau is ~ted in Suite 300, <br />2101 L StrM N,W,~ v,'ashington, <br />DC 2C'JJ37, The'; pro'vide a <br />number of publications. Amo.1g <br />topics ~!"a t~e ~ndts effective <br />~tins. how-to conduct 10 tightin~ <br />audit, and identification of major <br />concerns in rnodml Ughting. The <br />Bureau wm wnd a i1UbIicatio:\S <br />diri!dQry, free of t.lv.rge.) <br /> <br /> <br />9S JOURNAL OF HEAtTHCARE PROTEcnON MA."'iAGfMENT <br /> <br /> <br />maintenance; cmers .~' for <br />easy ec::ess, <br />"'C.?ntrols often are cor.sidered <br />In terms of their energy-sa;.J1ng po- <br />tenDal-l.e,. being able to !u.'T1 <br />bghts off when they're tL"needed. <br />From a wcurlty J"'lnt oh.'ie".rJ, ~"'ey <br />he1p assu..-e that tighti."'ig l'i en <br />"<N-hen it shou!4 be. Three type$ of <br />controls aJ'i ~d extP,!"sfiJe1y for <br />outdoor seaIrity lighting. 'fime <br />docks DCUvate lighting at pre deter. <br />m!ned ~. ern~oying eth::f an <br />.'".1ro..ornechani~ or e!ectrontc <br />~rdsm far the purpose. Most <br />time controi d1Mces petrn1t at <br />least ~-at~.time setting, end <br />SOtM are equ!ppped \NiL'1 ~ as- <br />tronomic feature \\Ih)ch adjUS!:s on <br />and off times ~ on d\e.nging, <br />hours c1light and dar....-ness ~:.iring <br />a yur. Photocell control$ sense <br />ambic'!nt nghting and adi\me eiec- <br />hie illurn1ne.tiG." when the amoier: . <br />falls below ~ p~t\etermined <br />amount. Photoaill-tfme clock <br />cootrol5 genetdlly keep I!gh~ off <br />for a predetermi"1ed pe.'iod of <br />ti.-m and then, during other <br />~riocis, ~'1ivate lighting ~d on <br />ambient cor.Ojtions, <br />"The e.Hedive ~pplications of <br />t.~e "''arious components (:an re- <br />su1t i:'\ an outdoor security Hghti!)~ <br />system whicl1 d02S far more t~ <br />pro\I<ae securit>' C!li~ ....7.~ .;....~~: <br />go-zs far beyond that o~ prC'i.'in- <br />tion ~on~. Soon after a lighting <br />sy5tem ~ L"'\StaUed, ~'e\.'W, its d- <br />fide.'1C'y and effeetiveness beg'>T1 to <br />decline; Jess light !.5 d~~~d M <br /> <br />PSYCHOLOGICAL EFFECtS <br /> <br />The National Bureau of Stan. <br />dards addressed security lighting <br />in f'.c~ 480-7 ("SeMty llahting <br />i,~,: Nucl~~r ~pon Storage <br />Sites"), ~.:ed tn N~!'nber <br />197i. <br />3.3.2 SubjeC'tive Impre.s- <br />s1a:1S or "'Mood'. 8Ic1tea by <br />S~curit>1 Ughting Systems ' <br />Th~ de.t~ value of a se~ <br />culity lighting S)r$~m ~ ~.ated <br />i1C\t 0>1.\; v.~th potf:f1;W Intrudeis' <br /> <br />