Professional Custom Lamp Holder Accessories Manufacturer

The incandescent lamp in the family, park, square, street, you could see, a bayonet and screw two. The lamp comprises a lamp holder, the filament and the glass shell is composed of three parts. The filament is made of metal tungsten with very high melting point (3410c), so it is also called tungsten filament; glass shell is pumped into vacuum, high power lighting is also filled with inert gas. When current passes through the filament, the filament is heated, and the heat is in the form of an incandescent state (the temperature is above 1700c) and a bright light is emitted.

A): the newly bought incandescent lamp has a light yellow or light red, some are colorless, what's the problem?
Engineer: because the filament is made of tungsten metal, and it is easy to oxidation at high temperature, to prevent the oxidation of tungsten, people have been pumping into a vacuum. But tungsten can occur sublimation, slow down the phenomenon, the people and the more than 60 watt bulb filled with nitrogen, argon and other inert gases into the. Therefore, 15 watts to 60 watts of light bulb is colorless, more than 60 watt bulb is colored

B): incandescent filament wound into a spiral, so what is the purpose?
Engineer: filament is wound into a spiral shape and pitch filament is very small, in order to reduce the heat dissipation, easy to heat, so that the current through the filament generated heat. Soon the filament temperature reached about 2500C, and maintain the temperature, filament in the incandescent state, continuous luminescence

C): why lighting will be used for a long time, dark black?
Engineer: due to tungsten metal at high temperatures sublimates, by solid directly into gaseous tungsten, hot tungsten vapor cold and in the sublimation of the inner wall of the lighting into small particles of solid black, this bulb is variable black reason; in addition, due to the lighting after sublimation after thinning, the resistance than the original to become larger, known by the p=U2/R, the real power of the lighting will become small, old friends and acquaintances lighting as a new light bulb

D): why burn occurred in the filament light moment?
Engineer: metal material resistance increases with the increase of temperature, the resistance of the filament is no exception, turn on the lights the moment, filament temperature low, small resistance, current than normal light large many times, it will be in a very short period of time produced a large amount of heat, the filament temperature rises rapidly and easy fuse. When the filament to work for a period of time, due to the increase in temperature, resistance increases, lamp current and power are close to the rated value, the normal work of light at this time, the filament to burn

E): the filament is broken, and then put on, the more bright than the original, why?
Engineer: after the filament, its length is reduced, so the resistance becomes small, because the voltage is constant, the power of the light bulb will become larger, so it is better than the original one. However, due to the actual power of the lamp is greater than the rated power, so it will lead to overheating of the filament and easy to fuse, that is to say that the filament can not be maintained too long

F): why the evening when the peak, the lamp is relatively dark, and the night is more bright?
Engineer: in the evening peak hours of electricity, multi-purpose electric circuit access due to these in parallel with electric appliance, the parallel part of the total resistance decreases, reduce the total resistance of the circuit, roads in the total current increases, voltage transmission line on the share of the increase, reduce the voltage at the two ends of the electrical, lighting power smaller, variable lighting dark late at night, access circuit used appliances to reduce, to increase the electrical shunt resistance, increasing the total resistance of the circuit, roads in the current decreases, transmission lead to voltage is reduced, to increase the voltage of both ends of the electrical, lighting power increases lights brighten

G): after the closure of the switch, the light bulb flash is how to return a responsibility?
Engineer: This is caused by the bad contact of the circuit. As between the terminals and the wire holder contact, screw loosening; switch contact.

H): how to determine the size of the two incandescent lamp power rating?
Engineer: the two lights at the same time access to home circuit, the power rating of a lighter high; also can compare the filament thickness, thick filament lamp power rating. This is because the filament diameter, small resistance, according to P = U2/R, u in phase at the same time, smaller R, P is big.

I): the family often have such a phenomenon: after the switch is closed, the lamp is not bright, measured with a test pencil found two terminals of the socket can make light of neon tubes, ask the fault in where?
Engineer: this phenomenon shows that the filament is good, but the neutral wire has been broken. When measured with a test pencil cap at the top of the two terminal and wire end can then neon light, but due to the neutral wire has been broken, neutral wire terminal and a neutral wire not connected, but it can filaments indirectly and wire end is communicated, so it can be used to make neon light. In addition, when the incandescent lamp switch is accidentally connected to the neutral wire, when it is disconnected, it will happen similar phenomenon

J): when the incandescent lamp, energy is how to transform?
Engineer: current acting through the filament, the electrical energy into internal energy, mechanical energy and transformed into light and incandescent luminous efficiency is very low, only about 8%. Most of the energy are in the form of heat energy dissipation into the air!

As time going, the energy saving lamp and LED light bulbs will replace the incandescent lamp.