Beam Angle

The angular dimension of the cone of light from reflectorized lamps encompassing the central part of the beam out to the angle where intensity is 50% of maximum. Categories from narrow angle to wider angle are Spot, Narrow Flood, Flood, Wide Flood.

Chandelier

A multi-arm, decorative, often ornate ceiling light fixture that holds a number of bulbs.

Color Rendering Index (CRI)

A measure of the correspondence between the color of an object and its appearance under a light source. CRI>60 or >70 is considered to be not good and CRI >80 is considered to be very good. CRI =100 is equivalent to natural sunlight!

Color Temperature

A specification of the color appearance of a lamp, measured in degrees Kelvin (K). For example: 2200K = “warm white”, 2700 = “soft white”, 3000K = “bright white,” 3500K = “neutral white”, 4000K = “cool white”, >5000K = “natural light”, and >6000K = “daylight”.

Efficacy (Efficiency)

The lamp’s ability to convert electrical power to light output. Simply put, lumens/watts.

ETL

Recognized as an NRTL in the United States and, in a similar capacity, as a Testing Organization and Certifying Body in Canada by the Standards Council of Canada. A product bearing the ETL Listed Mark is determined to have met the minimum requirements of prescribed product safety standards.

Flush Mount

A light fixture that is attached directly to the ceiling with no gap between the light and ceiling.

LED

A Light Emitting Diode (LED) is a semiconductor device that converts electricty into light. Most white light LEDs are coated with phosphors to change the color characteristics of the emitted light.

Lumens (luminous flux)

The measure of the perceived power of light, measured in lumens. Simply put, brightness!

Pendant

An ornamental hanging fixture with no multiple arms where the glass or diffuser opening faces down.

Semi Flush

A light fixture that attaches to the ceiling with a stem or part that creates a gap between the fixture and ceiling.

Sconce

A decorative lighting fixture with a flat side to be hung on a wall, that holds candles or lights.

TRIAC Dimmable

TRIAC dimmers are designed for resistive loads such as incandescent or halogen lights and have a significant installed base in the United States and worldwide.

UL

Is a global independent safety science company with more than a century of expertise innovating safety solutions from the public adoption of electricity to new breakthroughs in sustainability, renewable energy and nanotechnology.

Watts

A unit of electrical power. Lamps are rated in watts to indicate the rate at which they consume electricity.