Lighting

Lighting

Industry: Construction

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Lighting

refractor

Construction; Lighting

A device used to redirect the light output from a source, primarily by bending the waves of light.

ballast

Construction; Lighting

A device used to operate fluorescent and HID lamps. The ballast provides the necessary starting voltage, while limiting and regulating the lamp current during operation.

luminaire

Construction; Lighting

A complete lighting unit consisting of a lamp or lamps, along with the parts designed to distribute the light, hold the lamps, and connect the lamps to a power source. Also called a fixture.

quad-tube lamp

Construction; Lighting

A compact fluorescent lamp with a double twin tube configuration.

normal power factor (NPF)

Construction; Lighting

A ballast/lamp combination in which no components (e.g., capacitors) have been added to correct the power factor, making it normal (essentially low, typically 0.5 or 50%).

high power factor

Construction; Lighting

A ballast with a 0.9 or higher rated power factor, which is achieved by using a capacitor.

electronic ballast

Construction; Lighting

A ballast that uses semi-conductor components to increase the frequency of fluorescent lamp operation ( typically in the 20-40 kHz range. Smaller inductive components provide the lamp current ...