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Ears
The three individual slots that function as the color frame holder found on the front of some luminaires. They are often used to retain other items, such as color wheels, barn doors, etc.

Edison Connector
The standard household male, parallel blade connector that may or may not have a ground pin.

Edison Lampholder
The standard household screw-type lamp socket that accepts medium screw type lamp bases.

Egg Crate
A square or rectangular, partitioned apparatus that, when installed on large open face luminaires, reduces glare.

Electrical Current (I)
The flow of electrons from one point to another, in Amperes.

Electrical Frequency
The cycles per second of alternating current, in Hertz. In North America, and parts of South America and South East Asia, the frequency is 60Hz. The rest of the world operates on a frequency of 50Hz.

Electrical Noise
A general term for an unwanted electronic disturbance in conductors or electrical or electronic equipment. This equipment can also be the cause of electrical noise.

Electrical Power
The rate at which electricity is delivered to a circuit, in watts, or, in reference to magnetic transformers, in Volt-Amperes.

Electronic Ballast
A ballast that uses electronic components to limit electrical current. This type of ballast is often referred to as flicker-free.

Ellipsoidal
An abridged version of Ellipsoidal Spotlight.

Ellipsoidal Spotlight
A spotlight that embodies an ellipsoidal reflector and framing shutters, and sometimes an iris and pattern slot.

Eye Light
A small, intense luminaire used to front light a subject, usually a person’s face, with hard light.

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