Warren sheaf. [volume] (Warren, Marshall County, Minn.) 1880-current, 1914-05-06
COST OF ELECTRIC LIGHT

Eight Candle Power Lamp Will Burn
all Day for ~ cents-some Facts
and Figures About incandescent
Lamps Which Explain the Electric
Light Bill.
When one is able to figure out the
cost of an incandescent lamp for one
| hour then it is an easy matter to I'M
derstand the regular monthly electric
light bill. In this way you can figure
out the individual Lamps which are
costing the most and correct any er-
rors in the lighting system.
You pay for electricity by the kilo-
watt. A kilowatt is merely a thou
| sand watts. Watts is an arbitrary
| figure in electricity meaning the same
as horse power in mechanics. Every
one understands what ten horse pow
| er means. 1t means that motor, or
engine, will produce energy equal to
| the work of ten horses Now T46
watts are equal TO one horse power
| Therefore one watt is equal to 1-T46
| of a horse power. A thousand watts.
| or one kilowatt, is equal to one and
| one-third horse power. II your cleo
trio hight bill says you have consum-
| ed thirty kiIowatts it means that you
| have used forty horse power of cleo
! trfcity during the month. II the
| monthly rate is 10 cents kilowatt
you will pay for this power 500,
which is very little indeed for the use
| of forty horses for one month.
| Now let us figure out the cost of
| single electric lamp. Every one
should know by this time that the
MAZDA tungsten lamp, which was
| perfected several years ago, will give
twice the amount of light for the
| same money as the old-fashioned car
/ bon incaudescent lamp Anyone us
| ing these old carbon lamps can cut
his monthly electric light bill exact
ly in half by throwing the old lamps
| away and installing tungsten lamps.
Not only will he reduce the bill but
! he will get better and whittier light
| for his money
| Assuming that tungsten lamps are
F.! installed, what will they cost per
lamp? Look ON the bulb of the lamp
| You will find there little plaster
| giving the number Of watts requir-
| ed by the lamp. Let us take the
smallest lamp first 1t is rated at
ten watts and will give eight can
/ dte-power of light If the rate per
| kilowatt in your city is 10 cents per
kilowatt for one hour. or 1000 watts,
| then it will cost G0001 of cent for
one watt gnd 0oo01 Of q cent Tor ten
! watts for one hour At this rate the.
! ten watt lamp could be left burning
| for 100 hours, or nearly four days and
| a half. before it would burn up ten
cents worth of electricity.
The next size is the Is watt lamp
which gives about ten candle-power
of light. This lamp will consume
fifteen cents worth of electricity in
100 hours of continuous burning at
| the ten cent rate. In one hour it
will consume 0.0o15 cents worth of
| electricity. In 10 hours of continu-
Gus service it will have burned up on
ly 0.015, or a cent and half's worth
/ of current. The next size lamp is
the 25 watt, or twenty candle power,
lamp. This lamp will burn for forty
hours before consuming a kiIowatt,
or ten cents worth of current
The largest practical sized lamp
for use in the home is the forty watt
lamp. This lamp should be used on
ly where a large amount of light is
necessary for short intervals. It will
burn continuously for % hours for a
kitowatt of current
Now that we know exactly what
each lamp costs per hour, care should
be taken in the placing and distribu-
ton of the lamps to see that the
smaller sizes are used where the
longest light service is required On
the porch, in the halls, the bath
rooms, etc, where only a small
amount of light is needed but where
the lamps are allowed to operate for
hours, the small sized ten-watt lamp
should be used, as one of these lamps
can be used for a hundred hours con-
tinuously for a cost of but ten cents.
In the bed rooms, den. for the read
ing table, etc, where a little more
light is necessary, the fifteen and
twenty-five watt lamps should be
placed For the kitchen, dining room
and living room, where a maximum
amount of light is required, but for
/ shorter hours of service, the forty
watt lamps are entirely suitable, or
two of the twenty-five watt lamps
may be used to give a better distribu.
tion of hight. 1t is always better,
whenever possible, to use two or
more of the smaller lamps about the
room instead of one large lamp, in
order to secure good distribution OF
light and avoid the glare of single
high candle power lamp.