Color matching cabinet, also known as color assessment cabinets or light booths, are used to evaluate the color of objects under standardized lighting conditions. These cabinets simulate different lighting environments to ensure consistent color evaluation. The specific light sources used in a color matching cabinet may vary depending on the model and purpose, but here are the commonly employed light sources:

1. Artificial Daylight (D65): D65 is a standardized light source that simulates average daylight conditions, typically used for color matching and evaluation in various industries, including textiles, paints, and graphic arts.

2. Incandescent (A): The incandescent light source simulates traditional tungsten filament lighting commonly found in homes and offices. It is used to assess the appearance of colors under warm or yellowish light.

3. Cool White Fluorescent (CWF): CWF light sources emulate the color characteristics of typical cool white fluorescent lamps often used in commercial and retail environments.

4. Ultraviolet (UV): Some color matching cabinets include an UV light source, which helps to reveal fluorescent properties and detect color variations that may not be apparent under standard visible light.

These are the most common light sources found in color matching cabinets. However, it's important to note that the specific configuration and combination of light sources can vary depending on the manufacturer, industry requirements, and specific standards being followed.