Glossary Actual Throw Distance (ATD) The shortest measured distance between an instrument and its focus point, which defines the size and intensity of the light beam. All-skate Based on skating rink session periods when anyone can get on the rink and do anything they want. In a theatrical context, an all-skate is the rehearsal or work call where too much needs to take place in too little time. The compressed schedule results in every- one executing what's individually perceived as tasks necessary to achieve the common goal, but without any regard how those tasks may impact anyone else's ability to achieve their individual goals as well. Attribute Quality or characteristic belonging to func- tions, commands, or structures in a computer lighting environment or an automated lighting fixture. Autofollow A light cue or any action that begins at the moment the previous cue or action has completed its time duration. More loosely, any light cue that is linked to a previous cue. Its initiation may begin Beam angle The internal cone of a light beam cre- ated by an instrument. Usually defined in degree increments, it is the area of the light beam where the light is 50% of the intensity of that instrument's hot spot. Beam spread The overall size or width of a light beam created by an instrument. Often defined in degree increments. See field angle. Beating a Dead Horse The point when the same sequence has been tech'ed so many times that every- one at the production table can act the scene, dance the dance, or sing the songs. Meanwhile the director/ choreographer/person in charge still isn't satisfied. After ten times, the phrase is officially upgraded to "puree-ing the dead horse". After twenty times, lots are drawn to see who wins and gets to be the horse. Blackout A lighting state in which all intensity to all lighting instruments is off; complete darkness. Also referred to in the speed at which the state is