parameter. It is an efficient planning tool which offers protection from incorrect dimensioning, reliable compliance with industrial norms and regulations and optimum cost and energy efficiency. Last, but not [...] or workplace and machine safety. Up to now there have been no concrete specifications for the efficiency of signaling solutions. Manufacturers are often unable to give any meaningful data for the eff [...] application, the more important the actual coverage volume. Particularly in an alerting application, efficiency can be of crucial, even vital, importance. Workers today are faced with an increasing sensory overload