Knowledge base

Isophase light

Isophase light is a lighting signal in which the light source is on and off for an equal amount of time within...

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Equivalent Sphere Illuminance (ESI)

Equivalent Sphere Illuminance (ESI) is a lighting metric that measures the average illuminance on an imaginary sphere surrounding a specific point in...

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Fidelity Index (Rf)

The Fidelity Index (Rf) is a measure of the accuracy of color rendering in light sources. It indicates how well a light...

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Flicker Fusion Frequency (FFF)

The flicker fusion frequency (FFF) is the minimum frequency at which a flickering light is perceived as continuous by the human eye....

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Fenestra method

The Fenestra method is a technique used in architecture and lighting technology to optimally utilize natural light through strategically placed openings (fenestrae...

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Dichroic filter

A dichroic filter is an optical filter that reflects specific wavelengths of light while transmitting others. It is used in lighting, photography,...

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Colorimeter

A colorimeter is an instrument used to measure and analyze the color of an object based on the amount of light absorbed...

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Densitometer

A densitometer is a measuring instrument used to determine the optical density (density) of a material or surface . It is primarily...

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Discomfort Glare Factor (DGF)

The Discomfort Glare Factor (DGF) is a measure of how bothersome a light source is perceived to be , without necessarily leading...

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Disability Glare Factor (DGF)

The Disability Glare Factor (DGF) is a measure of the amount of bothersome glare a light source creates , which impairs visibility...

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Cornice lighting

Cornice lighting is an indirect form of lighting that is built into or placed on a cornice (a decorative border near the...

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Continuous Wave (CW) lamp

A Continuous Wave (CW) lamp is a light source that emits constant, non-pulsed light . Unlike pulsed wave lamps , which operate...

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