19 Terms
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Lighting products
Industry: Lights & lighting
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Lighting products
Ballast factor (BF)
Lights & lighting; Lighting products
This is the percentage of a lamp's rated lumen output that can be expected when operated on a specific, commercially available ballast. Note that the "rated output" is sometimes measured on a ...
Ballast hum
Lights & lighting; Lighting products
Sound generated by the vibration of laminations in the iron core of the transformer or inductor present in the ballast.
Ballast losses
Lights & lighting; Lighting products
Power or energy dissipated in the ballast as heat and not converted to lamp energy.
Base or socket
Lights & lighting; Lighting products
The socket is the receptacle connected to the electrical supply; the base is the end of the lamp that fits into the socket. There are many types of bases used in lamps, screw bases being the most ...
Base temperature (maximum)
Lights & lighting; Lighting products
The maximum operating temperature permitted for the base in Celsius. Fixture manufacturers need to ensure that these conditions are satisfied in their fixture.
Bayonet
Lights & lighting; Lighting products
A style of bulb base which uses keyways instead of threads to connect the bulb to the fixture base. The bulb is locked in place by pushing it down and turning it clockwise.
Beam angle
Lights & lighting; Lighting products
The angular dimension of the cone of light from reflectorized lamps (such as R and PAR types) encompassing the central part of the beam out to the angle where the intensity is 50% of maximum. The ...
