The Sunday telegram. [volume] (Clarksburg, W. Va.) 1914-1927, 1915-12-12
Demand for Electricity in the
Home z is Spreading Rap
Idly over the Country.

Tho demand for scientific and eco.
romical electric lighting Ia spreading
rapidly. and there seems to be need Of a
frief, clear. accurate statement OF the
main facts, such as any business man
RAY find suggestive and useful.
Measuring results in dollars and
cents. scientific lighting is valuable
asset. 1t appears on the ledger as
maximum office efficiency, with min
fnnum office force: maximum factory
output with minimum of rejects" and
seconds; maximum satisfaction Of
customers, clients, everyone to whom
you furnish. goods or service with
minimum OF complaint and trouble;
maximum Of health and comfort for
yourself. your employees, your custo-
mers, with minimum of worry, and an
noyance and expense; maximum of
light to use, with minimum of cur
rent to pay for.
Value Not Realized.
Tho value Of good illumination Is
not generally realized, because 1t Is
so subtle. People feel it unconscious
~. They avoid store that is harsh
ly or inadequately Illuminated. They
avoid noise, on the other hand, in a
store where the illumination is quiet
but effective. they stay longer, do their
shopping better, and buy more with
out knowing why. They speak well Of
the store and visit it often.
Illumination, good or not good, Of
ten costs more than 1t ought to, scien-
tific Illumination stops wastes and re-
duces bill. 1t produces at lowest pos
sible cost, the proper amount Of light
desired, and places 1t where 1t Is use
full.
By correct Illuminating engineering
It is generally possible to add twenty
five to fifty per cent to the disable IL
Elimination from the same current /;
Is business matter, and all that is
necessary is to apply to the lighting
problems the same common sense and
forethought, supplemented by the same
sort of expert advice which is ut the
bottom of all great modern success.
When once a scientifically correct
installation has been planned. It is
simply matter of developing 1t IL
changes are needed later. Tho orig
inal plan will provide for this.
Incorrect lighting equipment, al
ready in place, can also be made more
efficient and economical by the intro
duction Of correct methods.
Distribution of Light.
There are four methods OF lighting
room-concealed illumination, indi-
rect illumination, semi-indirect illu-
mination, direct illumination.
Concealed illumination Is the form
inswhich the source of light is thrown
directly upon the object to be illu-
minated, the source of light being hid
den from view.- This method is used
when 1t is desirable to hide the light
source and at the same time to have
a maximum Of light upon the object
to be Illuminated. lis used very sue
cessfully in show windows and show
cases.
Indirect illumination is the form
where the source of light is entirely
hidden, but the light itself is thrown
on the ceiling and walls to be reflect
ed and diffused by them throughout
the room. This method is employed
In some theaters, large rooms, public
halls and like places, partly for the
restfulness Of having no brilliant spots
constantly in the field of vision. This
is feasible only where ceiling and
walls are Of light tint, for objects that
are commonly spoken Of as light col
ored reflect. while dark objects absorb
light. No matter how good the re-
Election may be. there must necessarily
be considerable loss of efficiency as
compared with direct lighting. To OBJ
tain given amount of brilliancy.
therefore, more current must be con-
sumed.
One fault Of indirect illumination Is
the absence OF shadows. A certain
amount Of shadows is necessary, for
they produce the differences in in
tensity by which the eye readily dis
tinguishes objects and accurately
measures their position and dlmen-
slons. The lack Of shadows can be