Trade Advantage Program

Lighting & Design Glossary - E


This style is based on the functional and decorative elements of lighting and furnishing common in the early years of the United States. Elements included dark woods, a sturdy rustic feel and a bit of ornamentation.

Edison base (bulb)

This is the standard size bulb base, available in a range of voltages and bulb styles (i.e. E12 for candelabra, E26 for medium or standard size). It's called the Edison because he is associated with the invention of the incandescent bulb.


Simple put, "efficacy" is a determination of how energy efficient a lamp/bulb/light source is. More scientifically, "efficacy" refers to the amount of light produced by a light source (in lumens) as a ratio of the amount of power need to produce it (in watts).

Electrical Box

The electrical box is a plastic or metal container for electrical circuits where the main electrical service from a city's electrical grid is received and then distributed throughout a home. Also called a junction box, electrical junction box or breaker box.

Electronic Transformer

Used to convert energy into a different voltage. In home use, transformers are typically used to convert a higher voltage into a lower one so fixtures and appliances aren't overloaded.


A smooth, vitreous, and usually opaque coating made out of melted and fused glass powder that's baked onto metal, glass or ceramic pieces for protection and/or decoration. (Also the hard surface of a tooth.)


This is a voluntary label in Europe that means, when translated, "Electrical Certification concerning European Standard." This mark indicates compliance with European Standards (aka EN Standards).

Uses significantly less energy and saves substantially on energy costs. In lighting, energy efficiency is most often associated with light bulbs. Fluorescent and LED are considered to be the most energy efficient light bulbs in the marketplace today.

Etched/Acid-Etched Glass

A specific process using acid or abrasion to create frosted glass; often used to create opaque or translucent patterns in otherwise transparent glass.

The ETL Listed mark indicates testing and rating of lighting fixtures by the independent safety certification company, Intertek. For lighting products, it is a fully accepted alternative to the UL Listed mark.


In lighting, often used in describing the process of creating aluminum or plastic parts of the fixture. These extruded parts are pushed through an opening in a die, making them strong and lightweight.