QUALITY OF
LIGHT http://www.nebulaedeveloper.com/
Brightness …..
its perception, Brightness is a function of the Amount of light falling on the
surface and Reflectivity of the surface. Parent Brightness depends on the
ability of the eyes to adapt to its surroundings. Competing Brightness’s we
able for good visibility conditions. Control of relative brightness determines
the success of the lighting system. Excessive brightness rations in the filed of view results in poor visibility.
ABOUT LIGHT
LIGHT AND
DARKNESS
Factors
to be considered variation in the amount and direction of the incident light.
Variation in the sunlight intensity and position in the sky. Luminance and Luminance
Distribution of clear, partly cloudy and over cast sky. Effects of local
Terrain Landscaping and nearby buildings on the available day light.
DAYLIGHT VARIABILITY
Daily
and seasonal variations – due to movement of the Sun variations due to changes
in Weather (clarity of the sky) variations due to Cloud Movements which occur
within seconds. Day light May lead to problems of Overheating under lighting
has better results as a slightly under lit roomies Psychologically more
acceptable, as light is mentally associated with warmth and Reduced lighting
with coolness.
SUN AS A SOURCE OF LIGHT
Amount
of light varies with Depth of Atmosphere, The sunlight travels, Elevation of
Sun above Horizon, Amount of Atmospheric Dust and Moisture. The Position of the
Sun with respect top any reference point is expressed to any solar Altitude and
Solar Azimuth Angles. Luminance on exterior surface is due the Amount of dust
and Haza.
COLOUR CONTENT OF LIGHT SOURCES
Daylight
in sunrise and sunset are very warm. At Noon the light is cool and even cooler
if the sky is over cast. Warm North west slay Noon clear blue over cask sky
cool sunrise, sunset. Incandescence light
warm Yellowish Halogne light. Enhanced blue Spectrum Florescent light.
Cool source sunlight. Yellow Skylights white Bluish.
Color temperature
Although
surface colour has long been a primary consideration, colour as a controlled
characteristic of light has historic
precedence.
Color perception
Results
from the complex interaction between a light source, an object, the eye and the
brain. Darkness is the counterpart of light. Each complements theater a bright
surface could be appreciated fully when compared with a relatively darkener
surfaces of | luminance affected by psychological factor.
WINDOWS AS VISUAL LINKS WITH THE OUT SIDE
Satisfaction
derived from a window view is related to the total visual field which it
occupies and hence is a function of solid angle. National stratification of view
immediate foreground middle distance sky if for some reason view is restricted
at least some portion of each layer should be visible rather than one layer
alone. Further transoms should not obstruct the dividing lines.
v The
sky if formation about (upward) time of
day weather conditions. Provides varying light Exposure thus reducing monotony
| Maintenance of Proper Biological cycles.
v The
Horizon – Stabilizing, Comforting inner feeling (Level) Maintains senses of
Balance.
v The
ground Keeps one in tough with outside Activities & with nature.
VERTICAL OPENING
More
effective in letting in daylight granter in formation of time & weather
HORIZONTAL OPENING
Preferred
by most people provides the most desirables view stimulation along Horizontal
Axis.
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