▁and ▁radio ▁to wers . ▁Other ▁applications ▁are ▁in ▁alarm ▁systems , ▁emer gency ▁vehicle ▁light ing , ▁the atr ical ▁light ing ▁( most ▁not ably ▁to ▁simulate ▁light ning ), ▁and ▁as ▁high - visibility ▁running ▁lights . ▁ ▁They ▁are ▁still ▁widely ▁used ▁in ▁law ▁enfor cement ▁and ▁other ▁emer gency ▁vehicles , ▁though ▁they ▁are ▁slowly ▁being ▁replaced ▁by ▁LED ▁technology ▁in ▁this ▁application , ▁as ▁they ▁themselves ▁largely ▁replaced ▁hal ogen ▁light ing . ▁St ro bes ▁are ▁used ▁by ▁sc uba ▁divers ▁as ▁an ▁emer gency ▁signal ing ▁device . ▁ ▁St ro bel ights ▁are ▁often ▁used ▁to ▁give ▁an ▁ill usion ▁of ▁slow ▁motion ▁in ▁night cl ubs ▁and ▁ra ves , ▁and ▁are ▁available ▁for ▁home ▁use ▁for ▁special ▁effects ▁or ▁entertain ment . ▁ ▁History ▁▁ ▁The ▁origin ▁of ▁stro be ▁light ing ▁dates ▁to ▁ 1 9 3 1 , ▁when ▁Harold ▁Eug ene ▁" Doc " ▁Ed g erton ▁employed ▁a ▁flash ing ▁lamp ▁to ▁make ▁an ▁improved ▁st rob os cope ▁for ▁the ▁study ▁of ▁moving ▁objects , ▁eventually ▁resulting ▁in ▁dram atic ▁photograph s ▁of ▁objects ▁such ▁as ▁bul lets ▁in ▁flight . ▁ ▁E G & G ▁[ now ▁a ▁division ▁of ▁U RS ] ▁was ▁founded ▁by ▁Harold ▁E . ▁Ed g erton , ▁Kenneth ▁J . ▁Germ es hausen ▁and ▁Herbert ▁E . ▁G rier ▁in ▁ 1 9 4 7 ▁as ▁Ed g erton , ▁Germ es hausen ▁and ▁G rier , ▁Inc . ▁and