Terminology for flashing light signals
J.G. Holmes · Lighting Research & Technology · 1974
The growth in the technology of flashing lights has led to mixed use of words to describe the quantities and the effects. A consistent series of terms is presented, with a clear difference between the subjective (apparent) quantities and the objective quantities which may be the actual values or the nominal equivalent values obtained by calculation from some agreed formula. New definitions are given for some terms such as conspicuity, flash exposure or multiflick flash.