▁after ▁him ▁in ▁ 2 0 0 0 . ▁The ▁light ing ▁system , ▁which ▁is ▁made ▁up ▁of ▁ 7 6 8 ▁separate ▁flu ores cent ▁lights ▁re cess ed ▁in ▁the ▁bridge ' s ▁side ▁guard ▁rails , ▁was ▁the ▁first ▁of ▁its ▁kind ▁in ▁the ▁world . ▁After ▁being ▁in ▁continuous ▁operation ▁since ▁the ▁ 1 9 5 0 s , ▁replacement ▁parts ▁for ▁the ▁light ing ▁system ▁have ▁become ▁un available , ▁rendering ▁many ▁of ▁the ▁flu ores cent ▁bul bs ▁dark ▁and ▁ir replace able . ▁The ▁original , ▁flu ores cent ▁" String ▁of ▁Pear ls " ▁light ing ▁system ▁is ▁being ▁replaced ▁by ▁a ▁modern ▁LED ▁light ing ▁system ▁m im ick ing ▁the ▁" String ▁of ▁Pear ls " ▁effect ▁on ▁the ▁north ▁and ▁south ▁exterior ▁faces ▁of ▁the ▁re h abil itated ▁and ▁new ▁bridge ▁sp ans , ▁respectively . ▁However , ▁unlike ▁the ▁original , ▁the ▁new ▁side ▁rail ▁lights ▁will ▁be ▁for ▁orn amental ▁purposes ▁as ▁the ▁road way ▁itself ▁will ▁be ▁lit ▁by ▁traditional ▁overhead ▁light ing . ▁In ▁time ▁for ▁Memorial ▁Day ▁week end ▁ 2 0 1 6 , ▁the ▁new ▁light ing ▁system ▁on ▁the ▁south ▁exterior ▁face ▁of ▁the ▁new ▁bridge ▁was ▁ill umin ated . ▁The ▁north ▁face ▁will ▁not ▁be ▁ill umin ated ▁until ▁rest oration ▁of ▁the ▁original ▁bridge ▁is ▁completed . ▁ ▁Struct ural ▁problems ▁Document ed ▁cra cks ▁due ▁to ▁metal ▁fat igue ▁have ▁been ▁found ▁in ▁struct ural ▁members ▁of ▁the