How to choose the glow lamp or What it is more important - the Moon, the Sun or …?
Kozma Prutkov assured that the Moon is more important than the Sun, “ because the sun shines in the afternoon when already light-, and the moon - at night “. But what to do in moonless night? Very simply, to include a lamp! So, the lamp is more important than the Moon and the Sun?
Ancient hunters felt at a primitive fire in safety. And we, having clicked the switch, we begin to feel in heat and a cosiness. We are not threatened by unknown dangers from darkness any more.
It is impossible to present the modern house without bulb. As the whole world arose after the words “ yes there will be light “ and our house - yet not the house if in it there is no lighting. Switching on light, we, in some measure, join the act of creation. It is known that we receive 80% of data on the world by means of sight. And, including at night a lamp, we include for ourselves the most part of the Universe.
But here you came to shop and found out that there it is much more various lamps, than thought. There was a choice problem. First of all, you pay attention to dimensions of lamps and their contact knots. In many modern lamps traditional lamps just will not be located - more compact are necessary.
The socle size - the first and simplest criterion of the choice of lamps. There are a lot of various contact knots intended for leading of voltage to electrodes of lamps. However in this article we will consider only the lamps which are most widely applied in life - lamps with a screw socle.
The sizes of socles of lamps are strictly standardized. Most often apply E27 socles (power of a lamp of 25 - 200 W). It is so frequent that, buying a lamp in shop, we stipulate the socle size only when we need a lamp with a socle of other size.
Less often in life apply lamps with E14 socle (under cartridges “ minion “ the power of 25 - 100 W), and E40, E12 and E10 is absolutely rare. Latin letter “ E “ reminds us that the screw socle was offered by Edison (Edison), figures designate diameter of a carving in millimeters.
Much stronger glass cylinders of lamps differ by the sizes and a form. If in the middle of the last century we were quite satisfied still by standard pear-shaped lamps with a diameter of 60 mm, then now on a variety of a form and the sizes to bulbs compete unless only Christmas tree decorations. Boring monotonous “ pears “ even more often replace “ drops “ “ candles “ “ kegs “ spheres, cylinders and cones.
Presently especially you will surprise nobody with a lamp - Gulliver with a diameter of a flask, say, of 660 mm (such lamps the Osram firm lets out). The compact lamps possessing the same are more interesting if not bigger luminous efficiency, as traditional. The general tendency is directed just to increase in production of such lamps. They even more often can be seen in our apartments.
Then it is necessary to pay attention to lighting characteristics of lamps, such as their brightness, luminous efficiency, chromaticity and a number of others. Good lamps differ from less good in profitability, longer service life, and, unfortunately, higher price.
And except ordinary glow lamps the set of the light sources working at absolutely other principles - luminescent, halogen was available for sale, light-emitting diode, etc. Choose