The 400 candlepower light can be seen for 8 miles.
With the above conditions the 16 candlepower of light will require 3.
According to a bulletin issued by the Illinois Engineering Experiment Station on the efficiency of carbon-filament incandescent lamps, the amount of electrical energy per candlepower varied from 3.
A light of 1 candlepower will therefore produce an intensity of 1 candle-foot over 12.
The difficulty of manufacturing a 1-candlepower tungsten lamp for direct operation on a 110-volt circuit requires the filaments to work in series.
The best performance of carbon-filament lamps give a candlepower for each 3.
The term applies more particularly to the form of the base than to the voltage or candlepower of the filament.
Candlepower in this connection originally referred to the English standard candle which is made of spermaceti.
The candlepower is measured at various positions about the lamp with the use of a photometer, and the mean of these values is taken as the mean spherical candlepower.
On the label was printed the voltage at which the lamp was intended to operate, and also the candlepower it was supposed to develop.
The best lamp for the purpose is an 8-candlepower showcase lamp, the same as shown in the illustration.
A room 15 x 20 feet, in dark wood and hangings, needs eight eight-candlepower reflector lamps, backed up by six more eight-candlepower lamps.
Assuming a room is 15 x 15 feet, and furnished in light tones, four eight-candlepower lamps are ample.
Bedrooms 15 x 15 feet in size, where they are not furnished in deep colors, should be equipped with two sixteen-candlepower lights.
It is estimated that 300 square feet of a hallway requires four sixteen-candlepower, or eight eight-candlepower units.
The particular cell set apart for our accommodation was lit by a half-candlepower bulb with a pronounced flicker, which shed a dim, religious light upon a walled-in space about ten feet square.
He had the usual idea, at the start, that a current strong enough to light a 100 candlepower lamp would kick like a mule if a man happened to get behind it.
Lamps can be had for these batteries ranging in sizes from 2 candlepowerto 25 candlepower.
Here again, the farmer need not worry over lack of highest efficiency, as a lamp giving only 80 per cent of its rated candlepower is still serviceable when he is not paying for the current.
Let us say a lamp circuit consisted of 6 carbon lamps, of 16 candlepower each.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "candlepower" in a variety of sentences. We hope that you will now be able to make sentences using this word.
