Knowledge base
Isocandela line
An isocandela line is a graphical representation of the light intensity (candela) in different directions around a light source or fixture. It is used in lighting engineering and design to...
Read moreStevens effect
The Stevens effect describes the phenomenon whereby perceived contrast increases as the brightness of the environment increases . This means that dark shades appear darker and light shades appear brighter,...
Read moreHunt effect
The Hunt effect describes the phenomenon where colors appear more vibrant and saturated as brightness increases . This effect occurs in both natural and artificial lighting and is an important...
Read moreFoot lambert (foot-lambert, abbreviated fL)
A foot-lambert (abbreviated fL) is a non-SI unit of luminance , or the brightness of a surface that emits or reflects light. It is primarily used in the film, television,...
Read moreCoefficient of Utilization (CU)
The Coefficient of Utilization (CU) is a measure in lighting design that indicates how efficiently a lighting system uses the light it generates within a space. It is expressed as...
Read moreCeiling Cavity Ratio (CCR)
The Ceiling Cavity Ratio (CCR) is a measurement in lighting design that describes the ratio of the ceiling to the fixtures . It is used to determine how light is...
Read moreRoom Cavity Ratio (RCR)
The Room Cavity Ratio (RCR) is a measurement in lighting design that describes the relationship between the height, width, and length of a room . It is used to calculate...
Read moreFloor Cavity Ratio (FCR)
The Floor Cavity Ratio (FCR) is a measurement in lighting design that describes the geometric relationship between the floor and surrounding surfaces of a space. It helps calculate how light...
Read moreGobo projector
A gobo projector is a lighting fixture that projects a pattern, image, or text using a gobo (a template with a cut-out design). This type of lighting is widely used...
Read morePC spot (Plano Convex spot)
A PC spotlight (Plano Convex spotlight) is a focused theatrical light with a single plano-convex lens . This type of lamp is widely used in theater, television, film, and stage...
Read moreTheater lighting
Theatrical lighting encompasses all lighting used to enhance plays, concerts, operas, and other stage productions . Its purpose is to enhance the atmosphere and emotion, make the actors and sets...
Read moreElliptical Reflector Spot (ERS)
An Ellipsoidal Reflector Spotlight (ERS) , also known as an Ellipsoidal Reflector Spotlight , is a focused theatrical light that produces a sharp, precisely adjustable beam of light . This...
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