As such, LEDs won't be damaged at all by switching, since there is no filament to damage and the power going through the bulb is lower. This means that the LEDs require much less voltage and current, meaning low power consumption compared to the lights with filaments. The LED however, is the only type of light emitting device out of the list that doesn't use a tungsten element. Either way, turning on the light every time does damage the filament and will result in long-term damage.
#Flick me light full
I conjecture that the thermal shock is less for a fluorescent than for an incandescent, since the fluorescent lights are not immediately heated up to full throttle because the starter has to try multiple times to start the light (usually over a period of several seconds). For an animation of this, check out "How a Fluorescent Light Works".Īnyway, the idea is that the tungsten element undergoes thermal shock every time the light is turned on. The light will only sustain when the magnetic field is strong when it collapses. If the kick isn't strong enough, there won't be enough electrons to sustain the circuit through the tube and the light will flicker. The filaments heat up more gradually since the starter (D in the diagram below) has to switch multiple times in order to kick-start the electrons flowing through the tube, not just one time like the incandescent light.īasically, the starter (a bi-metallic switch) heats up and opens periodically, causing the magnetic field generated by the ballast (G) to collapse and release an inductive kick into the tube. The inrush current is on the order of 12 to 15 times the peak current if not limited by the methods described in the application note.įluorescent bulbs operate by a "starter" and "ballast" design.
Incandescent bulbs are simply turned on once and left on. However, the method to "turn on" the lights varies. Halogen, incandescent, fluorescent, and vapor lights all use tungsten filaments that heat up and emit electrons via thermionic emission.
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