Safety alarms and warning lights emit audible signals, visual alerts, or both to alert personnel to potentially dangerous conditions. Audible alarms create sound-based signals to alert personnel to specific events. Warning lights and strobes create steady or blinking light patterns to visually indicate specific conditions. Combination audible and visual alarms emit both sound-based and light-based signals to alert personnel of an event. Accessories and replacement parts for audible alarms enhance alarm functionality or replace damaged parts. Guards and covers for alarms and wall fixtures protect alarm system components from bumps and accidental damage. Fire alarms and strobes are designed to meet applicable fire codes and alert personnel to possible fire conditions or hazards.