▁more ▁prominent ▁label ▁than ▁Ton ede af . ▁It ▁was ▁soon ▁followed ▁by ▁an ▁E . P . ▁release , ▁L umin ous , ▁also ▁in ▁ 2 0 0 4 ▁on ▁Metropol is ; ▁it ▁composed ▁largely ▁of ▁rem ixed ▁material ▁from ▁Element al . ▁Ces ium _ 1 3 7 ' s ▁style ▁was ▁much ▁m ell ower ▁and ▁synth pop ▁inspired ▁and ▁less ▁ang st - rid den ▁on ▁these ▁releases ▁than ▁on ▁Advanced / Dec ay . ▁In ▁ 2 0 0 6 , ▁Ces ium _ 1 3 7 ▁released ▁their ▁album ▁Int ellig ent ▁Design . ▁Like ▁its ▁prede cess or , ▁it ▁was ▁released ▁by ▁Metropol is . ▁ ▁Ces ium _ 1 3 7 ▁is ▁named ▁after ▁a ▁radio active ▁is ot ope ▁of ▁ca es ium . ▁It ▁continues ▁a ▁tradition ▁in ▁industrial ▁music ▁of ▁incorpor ating ▁a ▁number ▁in ▁the ▁band ▁name , ▁which ▁became ▁popular ▁after ▁the ▁example ▁of ▁Front ▁ 2 4 2 . ▁It ▁also ▁continues ▁the ▁nar ro wer ▁tradition ▁in ▁industrial ▁music ▁of ▁adopt ing ▁the ▁name ▁of ▁an ▁is ot ope ▁as ▁the ▁band ▁name , ▁as ▁with ▁Car bon ▁ 1 2 ▁and ▁Front ▁ 2 4 2 ▁off sh oot ▁Cob alt ▁ 6 0 . ▁ ▁In ▁ 2 0 0 8 , ▁Ces ium _ 1 3 7 ▁released ▁a ▁digital ▁single ▁(" F light ") ▁and ▁a ▁full - length ▁album ▁( Proof ▁of ▁Life ). ▁The ▁album ▁put ▁a ▁conscious ▁emphas