Daylight lamp tube do not ballast, can connect directly electricity
Characteristics of the fluorescent lamp, lamp began to ignite need a high voltage, normal light allows only by small current, the voltage is lower than the voltage at the ends of the tube. This high voltage is provided by what we call the blister.
This voltage can't make neon bulb conductive (neon bulb breakdown voltage is 150 v or so) and shine, bimetallic strip is no longer connected, at this time, the fluorescent lamp can continuous light. Is a core inductance coil inductance ballast, the inductance of the nature is when the current in the coil change, will cause the change of the magnetic flux in coil, thus produce inductive electromotive force, the direction and the current in the opposite direction, thus hindering the current changes.
Switching power supply, due to the two pieces of metal in the neon bulb of the starter didn't get through, breakdown neon electric power supply, then we see neon bulb light, neon conductive heat, cause the bimetallic strip inside the neon bulb (is the root that we saw the bending) heated bending is reduced, at the same time through two electrodes, the ballast by large current. High voltage required to reach the start of fluorescent lamp. Later, because of the bimetallic strip after connect neon bulb in the neon conductive light no longer, the temperature drops rapidly, bimetallic strip restorable, quickly cut off power supply, the current from the larger values of the ballast suddenly become O, produce high self induction electromotive force, the self-induction voltage is enough to breakdown of the fluorescent lamp mercury vapor, the mercury vapor ionized conductive produce ultraviolet (uv) and excitation fluorescence powder, fluorescent tube, after conducting tubes on both ends of the voltage drop (100 v)
