18 - Friday, October 6, 1989 - North Shore News

When decorating, choose correct lighting

WHEN TALKING lighting
technicalities, a bulb is a lamp and
a lamp is a tuminaire.

Contributing Writer

When it comes to lighting, the
battle between measurable
physiological effects and subjective
psychological vision theories rages
on.

The confusing terminology —
candelas of luminous intensity and
foorcandies of surface light flux —
does not help.

Basically, there are three types
of lighting General or ambient
light allows safe movement across
a furnished room. Task lighting
enables close work, requiring as
much as one hundred times general
lighting level, and dramatic

Hi-tech light buibs solve

lighting pinpoints features for
enhanced effects.

General, task and dramatic fix-
ture types include recessed, flush
mounted, track o: pendant ceiling,
valence or wall mounted and por-
table floor or table fixtures.

Light fixtures utilize many
sources, including warm, cozy-
yellow incandescent, economical,
cool-blue fluorescent, and hot,
true-white tungsten-halogen. Using
diffusion, reflection and refraction
devices, good fixture design avoids
direct glare which can make seeing
difficult, and harsh shadows
preventing the contrasts that can
cause fatigue.

Another factor which determines
appropriate lighting level is the oc-
cupant's age. Accerding to the late
Darell Boyd Harmon, optical
theorist, reducing high contrasts in

home lighting problems

From page 17
cent at 100, and typical! fluorescent
resting around 65.

The result is a warm, inviting
color that makes decor, fur-
nishings and even skin-tone look
better.

The color rendition rating or
CRI of the third bulb produced by
General Electric is also 82. The
Compax is a unique design most
Suitable for fixtures which expose
the bulb as part of the design.

Using 15 watts of energy, the
Compax delivers 799 lumens of
light and has an average life of

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9,000 hours. Once again, com-
pared to the standard 100 watt
bulb, this means double the light
for seven times the energy con-
sumption and almost one-tenth the
average life span.

All three of these hi-tech bulbs
face common limitations to single
levels of energy flow, restricting
use with high-low, tri-light and
dimmer switching.

With the improvements ia light
quality added to savings in energy
consumption and bulb replacement
costs, it is the smart consumer who
takes heed.

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a student’s study area will reduce
distractions and therefore improve
memory retention and = enhance
performance.

A 1974 study at Cornell Univer-
sity found that with exposure to
full-spectrum = sunlight-simulating

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fluorescent light students exhibited
better visual sharpness and less
physiological fatigue than those
studying under conventional
fluorescents.

On the other extreme, writer
Ann Rhodes contends that for

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specific jobs, the average forty-
year-old fas wvice the light re-
quirements of a twenty-year-old. A
fifty-year-old may require four
times, and a sixty-year-old may
require ten times the light of a per-
son one third his or her age.

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