red brand label lighting pink font orange number signage brown furniture circle hand design sign text award white fire alarm button inside hospital factory industry zone use emergency warning purpose wall blur background space 911 alert bell box building business danger equipment escape evacuation hazard help indoor industrial interior isolated light object panel press prevent prevention protection pull push rescue room safe safety security signal siren sprinkler switch system urgency warn 911 alarm alert background bell box building business button circle danger emergency equipment escape evacuation factory fire hazard help hospital indoor industrial industry interior isolated light object panel press prevent prevention protection pull push red rescue room safe safety security signal siren sprinkler switch system urgency wall warn