- A conventional lighting fixture with a remotely controlled colored changeable filter over the lens. There are three kinds of mechanisms used in color changers, a wheel with lens sized holes into which. Used . colored gells can be placed, multiple fixed filters that can be moved in and out of the beam to mix the colors and a scroller which uses continuous, usually dichroic, filters to mix an even . Used . greater number of colors.
- An amp rack is any furniture, fixture, or case where multiple amplifiers are mounted in slots or grooves, generally used in touring systems because they are easy to transport.
. Used . . Used . ...Followspot
- Followspot is a generic term used to describe any number of lighting instruments used to highlight performers on stage. A followspot operator moves the followspot to follow the performer or to accent. Used . some action or prop etc. Somtimes called limes, dating back to the days of limelight.
Followspots are generally much brighter than conventional lighting instruments, and often u. Used . se a lamp with a considerably higher color temperature. Lumen
- In physics, specifically photometry (optics), the lumen (symbol: lm) is the SI derived unit of luminous flux. It is the amount of light that falls on a unit spherical area at unit distance from a sour. Used . ce of one candela. In steradians this is equivalent to the amount of light that falls on a unit solid angle from a light source of one candela. Alternatively, one lumen is the total light pro. Used . duced by an isotropic light source of (1/4p) candelas. A 100 watt incandescent light bulb will output around 1500 lumens. ...Acoustics
- Acoustics is a branch of physics and is the study of sound, mechanical waves in gases, liquids, and solids. A scientist who works in the field of acoustics is an acoustician. The application of acoust. Used . ics in technology is called acoustical engineering. There is often much overlap and interaction between the interests of acousticians and acoustical engineers.
"... acoustics is . Used . characterized by its reliance on combinations of physical principles drawn from other sources; and that the primary task of modern physical acoustics is to effect a fusion of the principles normally adhering t...