What is FILAMENT?
Filament is generally made of tungsten wire.
It's the filament's job to convert Electrical Energy into light output.
Filament is the work part of a light bulb.
Electric Energy heats up the filament until it emits photons.
Bulb Voltage design is directly related to the uncoiled length of the filament.
Due to limited space inside the bulb, tungsten is coiled and mounted into various filament shapes.
Depending on filament length it's often necessary to coil the filament once (coiled) or twice (coiled coil) to fit inside the glass envelope.
Low voltage designed bulbs have short thick filaments where as same wattage higher voltage bulbs have longer thinner filaments.
Filaments designed for higher voltage are more fragile so in more danger of damage from vibration/shock.
Sturdy filaments of lower voltage designed bulbs better resist damage from vibration.
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