Glossaries

Fixture

Housing portion of the luminaire, connecting a light to the infrastructure (ceiling, wall, pole, etc.)

Luminaire Components

Lumens (lm)

Unit of measurement for the total amount of visible light emitted by a source. Higher lumens indicate brighter light.

Basic Lighting Terms

Incandescent Bulb

Traditional light bulb that produces light by heating a filament inside a glass bulb.

Traditional Lamps and Fixtures

Recessed Lighting

Fixtures installed into the ceiling to provide unobtrusive lighting, often used in modern design.

Lighting Design and Applications

Ballast

Device used to regulate the current to a fluorescent or HID lamp, ensuring it starts and operates properly.

Electrical and Control Systems

Mounting Bracket

Structural component used to attach lighting fixtures to surfaces, such as walls or ceilings.

Installation and Maintenance

Appraisal

Unbiased professional opinion of a property's value, conducted by a licensed appraiser.

General

Cost Approach

Estimates value by the cost to replace or reproduce the property, minus depreciation.

Types of Valuation

Net Operating Income (NOI)

Income generated by a property after operating expenses are deducted, but before financing costs or taxes.

Income-Producing Property

Focus Earth Glossary