Fluorescent broken home, there are many causes, probably because there is no regulator, power fluctuations cause, there may be a lamp aging, here we analyze in detail next.
The phenomenon is: one or both ends of the lamp black, blackened large range, or around the 18W fluorescent tube black surface. Lamp does not light in motion, or have short flash, the action does not immediately extinguished discharge. Tube ends are issued without producing deep orange glow discharge effect. The reason enough to prolonged use, and the two electrodes simultaneously around the phosphor coating faded down or end faded off. At this point, you should replace the lamp.
Lamp usage time is not long, far below the nominal time. The reason is not suitable for the power supply voltage, switching frequency caused by too much to start, or because of poor contact pin. Approach is to identify the data ballast on? Minimize the switching frequency, detailed examination of parts and accessories for all contacts.
The bulb-end color, shading occurs in a wide range, black or brown rings ring. The reason for this phenomenon is the condensation of mercury lamps, ballasts and lamps do not match, or a bad starter quality. It should also measure the voltage compliance, the contact portions are good contact.
Tube ends only dark light without light, because the capacitor short circuit inside the starter or stick inseparable contacts or wiring errors. Treatment methods are: put a new starter Look.
Phenomenon is closed when the start switch, flash a long time, this continues, the lamp will soon be damaged. The reason for this 18W fluorescent tube may be fluorescent tube has been in use for a long life will end. If you are a new lamp that happens, then that is the quality of the lamp is not high, or because of outdated and useless starter. If the supply voltage is too low, the ambient temperature is too low or the lamp is difficult to start. Overhaul, if it is a new lamp should put it to another test a better light on what, if still difficult start, the lamp is a problem, as it proved to be a good test tube, then the regulator should be checked starter and ballast, or increase the voltage, or until the room temperature reaches room temperature before starting to use by the regulator.
Noise emitted 18W fluorescent tube ballasts, which was mainly due to problems caused by the installation undesirable, or ballast internal iron vibration, or the lamp and ballast specifications do not match, the ballast itself, fever, there are other reasons ballast partial short circuit.
This method of treatment 18W fluorescent tube is the ballast with a soft rubber cushion pad up so will reduce some noise. Also check the wiring for errors in detail, and then there are the ballast removed, alone with the rated voltage, so that you can determine whether there are problems with the ballast.