Exterior Entry Lighting, Ideas for Outdoor Lighting, Exterior Lighting Trends by Capitol Lighting

Exterior Entry Lighting, Ideas for Outdoor Lighting

, Exterior Lighting Trends by Capitol Lighting

Exterior Lighting Trends and Exterior Entry Lighting Ideas for Outdoor Lighting

Exterior Entry lighting indicates where the entry is, safely lights the way in and out of the building, and lights signs or building numbers. New ideas for outdoor lighting and exterior lighting trends place great emphasis on aesthetically pleasing entry lighting.

'Less is more.' and 'Many are better than one.'

These seemingly contradictory principles applied to entryway lighting result in inviting, uniform light levels. Use multiple low light level fixtures instead of one very bright fixture.

If you use just one fixture, the area nearest it is too bright and the areas farther away are too dim. Using multiple fixtures lets you put the light in the key areas of interest: near signs, by doorways and stairs thus more evenly distributing the light. Exterior lighting trends dictate a mixture of task and accent lighting to highlight your home's exterior and provide safety and security. Outdoor lighting ideas such as uplights and post lights can help accomplish these goals.

Light levels at the Entry

Glare is caused either by direct view of an unshielded light source or by too much contrast if the rest of the exterior is relatively dark. A contrast ratio of less than 5 to 1 is desirable to softly accent an area without creating glare. Exterior entry lighting is so important because it gives a first impression of your home.

When someone leaves an excessively lit building, it takes the eye longer to adapt from a bright entry to the darker walkways outside, making it difficult to see.

Where Does Extra Light Go?

In addition to causing visual difficulties, excessive light adds to other problems as well. All this extra light reflects off the surrounding walls and walkways, bouncing into the sky, creating "light pollution" (even concrete has a reflectance of up to 40%!).

Light trespass invades adjacent buildings and light pollution reduces our ability to view the moon and stars, compromising our quality of life.

As our cities and neighborhoods grow, the overall night time lighting levels become brighter. This is due in part, ironically, to the availability of very efficient new light sources. Unfortunately, energy efficient light sources tempt property owners into using higher light levels instead of lower power consumption (see information at the end of the article).

Exterior lighting trends call for lower wattage lights, to spread more focused light, evenly over outdoor areas. Ideas for outdoor lighting can extend well past exterior entry lighting into walkways and gardens.

As you can see, the 100 watt HPS is far brighter than the base case 100 watt incandescent. The result is light pollution, sky glow and light trespass.

Additionally, extra light does not always mean we can see any better. The eye can adapt to very low light levels (moonlight is less than 1 foot candle) and very high light levels (a sunny beach can be over 20,000 foot-candles), but it only adapts to one light level at a time. A really bright entry makes the walkway approaching it appear dark. Low level lighting on building A, next to bright glary lighting on building B, makes building A appear dark in comparison. This may result in an upward spiral of increased light levels. From the table, a much better choice is the lower wattage metal halide or compact fluorescent (CFL), providing similar light levels to the base case but with reduced wattage.

Base case.

100 watt incandescent = 1700 lumens.

Same wattage, much higher light level. 100watt High Pressure Sodium = 8500 lumens

Lower wattage, similar light level. 32watt metal halide = 1900 lumens. 32watt triple biax Compact Fluorescent (CFL) = 1870 lumens.

Design Questions Aesthetics, functionality, and maintenance are major points to consider as you design a lighting system.?

Will it work? Is the light delivered to the right places?

Are light levels appropriate for safety? (Not just minimum light levels, is there too much light?)

How does it look? Do the fixtures and lighting conform to an appropriate design aesthetic?

Is there even light distribution and low glare? (Uniformity and low contrast can aid in visibility.)

Will there be high long-term maintenance costs?

For example, a 300-watt halogen flood light may cost $10 to buy, while a 22- watt CFL costs $30, making the halogen appear the better buy. But if the fixtures are on 10 hours/day, they will have an annual operating cost of: $6.92 for the CFL and $63.70 for the halogen! (at $.05/kWh). Plus, the CFL lasts 10,000 hours, while the halogen lasts only 2,500 hours.

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