LIGHTING GUIDE

The Lighting Objective

 

A well lit room is one in which all the the lighting design (both fixtures and technical plan) blend together to create a beautiful environment in which your eyes focus on the objects the light falls upon rather than on the light itself.

 

Guide Purpose: This guide is a practical overview of lighting technology and application. Our focus is to teach people how to create a better lighting environment while achieving high levels of energy conservation.

Types of Lighting

 

Task Lighting

This light is mainly used to illuminate an area where activities like reading,sewing, or preparing food occurs. Task lighting is often achieved with fixtures that direct light onto a work surface.

 

 

Ambient Lighting

Most often called the "general light" provides a soft level of light for watching TV or entertaining.

 

Accent Lighting

Similar to task lighting, however the light is focused directionally. Used for artwork, architectural features, or reading.

 

 

Utility Lighting

When you need a lot of light, utility lighting is used mainly for "flood areas" such as outdoors or when doing work around the home.

 

Light Levels

 

Light bulbs emit billions of little light particles from their surface. The amount of light particles emitted is called Lumens. If you look on a light bulb or on its package you will see how many lumens it emits; the higher the lumens the better we should see (keeping color constant: see Color).

 

Depending on what type of activity you would like to perform there are recommended lighting levels. Because light levels change with the distance from its source and items like shades and covers block light, one can measure the light level using a light meter (costing approx. $30) which will read the light in lux (i.e. lumens per square meter). We have provided a short guide to help you determine the appropriate amount of light for various activities.

 

Recommended foot-candles

Casual reading

Intensive reading or studying

Kitchen & laundry

Dinning entertaining

Workshop

Model building or hobbies that require detail

200-550

550-1100

200-550

100-200

550-1100

1100-2100

Activity

Lumens/sq. meter

Color of Light

 

A light's color affects how we perceive the color of an object. For example, a blue painting under a bluish light will heighten our feeling of its blueness but a red painting under a blue light will make it very dull and grayish because there are no "red color waves" made by the light.

 

The main indicator of color is the CCT (correlated color temperature) measured in degrees Kelvin. Lights of America typically uses 2700K warm spectrum bulbs for indoors and 6500K for outdoors

 

Light sources also have another important index: The color rendering index (CRI) scaled 1 to 100. CRI is important in a home because it affects how furniture, decorations and even people look. Incandescents are considered the best at 95 to 100. Newer Tri-Phosphor Fluorescent (this is all Lights of America uses 84 to 88

CRI) is rated above 80, while mercury vapor and old fluorescent are 62 or above. Using CRI with 84 or better gives very little color shift loss.

 

Correlated Color Temperature

Warm Spectrum

2500K - 3000K

Cool Spectrum

3200K-6500K

Color Rendering Index

CRI 62

CRI 84

CRI 95

All information provided herein is accurate to the best of our knowledge and is for informational purposes only. No liability is assumed by Lights of America, Inc. for any errors or omission of specification data. Please visit "contact us" and submit your inquiry to the customer service department at Lights of America for the most accurate and up to date information. All information provided herein is subject to change without notice.

 

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