The Sunday telegram. [volume] (Clarksburg, W. Va.) 1914-1927, 1915-12-12
Offset by an occasionally direct light
Best Compromise.

Scmi-indirect illumination is the
form where part Of the light is thrown
by glass bowl or dish to the cell
ing and walls and thence reflected and
diffused by them throughout the room
while the rest Of the light is diffused
by direct transmission through the
glass. 1t is the best compromise be-
tween direct and indirect lighting, as
1t gives sufficient shadow and wastes
less light through absorption than the
INDIRECT. 1t is not, however, so eco
nominal as the most, used. On the
other hand the semi-indirect method
Is more economical than the indirect
gives the most agreeable general IL
animation. and can be done very
handsomely.
Direct illumination Is that form
where the lamps. are in sight. and
their light is distributed Immediately
from them. This is the most common
method because Of its greater econ
omy. Local illumination, which con-
centrates the light on broad abjcat
such as a reading, or drafting table.
desk, or machine. without reference
to general illumination in the room is
particularized form Of direct illumi
nation.
The efficiency Of direct illumi1a
given the proper wiring, outlets and
switches, is matter Of fixtures, globes
and shades, but particularly the globc
or shade, because the brightest light
can be almomst smothered into noth-
ing by the wrong shade, or on tho
other hand can be intensified so much
that the eye cannot stand It.
The purpose Of the fixture is to hold
the lamp in the position form which
the light may be directed to the great.
est advantage. The temptation to make
decorative features of design is at tho
expense OF effective illumination. Tho
light is thrown in the wrong direc-
tion. the fixture gets in the way and
causes shadows, the cost Of installa.
ton is made unnecessarily great. The
fixture should hold lamps at the prop,
err distance from walls, floor and cell
ing. with Consideration for the color
or the covering of each. and at the
proper angle. for directing the light Ia
the most advantage. Fixtures not only
should be appropriate, they should be
SO we'll suited to their surroundings
and purpose as to be entirely incon.
81 !cuous.
Holder Is Important.
Given proper fixture, it Is of the
utmost Importance that the. shade
holder should be right. For, If it holds
the shade SO that the lamp is set too
far into 1t, the light is smothered, and
is reflected back upon itself within
the shade, instead Of being thrown
out into the room, and most Of the
light can get out only by transmission
through the glass. On the other hand,
II the holder allows the lamp to pro-
ject beyond the shade, there is SER
ious loss of both reflection and diff
fusion and the bare filament is trying
to the eyes.
Globe, shade or refector-This is
an extrememly important subject, and
one where at present, occurs the great
est loss Of illumination. To under
stand the effect of the shade or re-
Hector, we must consider first the
different shades of glass, and how
they affect light, and second the eff
leCL Vi Suupe. dluSb uOeS URGE tuluSs
to light. transmits. reflects. or absorbs
Absorption Is waste. Nobody wants
more than he can help Of that. Bet
ter not create the light-better keer
your money. Nevertheless there Il
necessarily more less absorption. Re
Election sends the mass Of light where
you want 1t. Transmission lets the
light through. to give the general II.
Elimination desired. Direct transmits
sion, clear glass, sends the light
through without change of direction OF
quality and hurts the eyes. Dltfused
transmission (diffusion) scatters The
rays and saves the eyes. with more OF
less waste of light by absorption. Fol-
general purposes the ideal distribution
Of light is a combination Of reflection
end diffusion, throwing q strong light
where special illumination is needed
at the same time spreading q more
subdued general objection OF an iso-
lated bright spot which disturbs the
eres. The four typical forms Of glass
~ " = p. NJ o. g