What is the exact difference between a CFL bulb and an ordinary tubelight?

Question

Both emits similar light except for the difference in shape

Answer 1

regular light bulbs have certain elements in them, that when electrified, emit radiation in the infrared. this is why regular bulbs get hot. when we turn on the light we need light, not heat. that's why these are wasteful. they're producing all this stuff we don't need.

CFL bulbs have elements that when electrified, emit mainly visible light, what we need. also why they tend to remain cool to the touch.

Answer 2

The long fluorescent light bulb has filaments at both ends and the tube is basically vacuum. Inside of the tube is coated with a material that emits light when exposed to energy.

What your light fixture does, is to briefly heat the element to get the process started, and quickly apply very high voltage (in thousands of volts) to get a spark (sort of speak) going BETWEEN the filaments. The energy emitted by this continuous flow of electrons (spark) excites the coating inside the glass tube to emit visible light. By this time, the elements are no longer heating. This is what "ballast" in the fixture does.

The CFL light bulb contains all the circuitry necessary to do this, where as the "tube light" depends on the fixture to do most of the work.

By the way, what I termed "spark" is not exactly correct. It's a flow of electrons, but that was the easiest way to explain it.

Answer 3

You answered your own question. Compact Fluorescent Lightbulbs are just small, (usually) twisted fluorescent lamps.

Fluorescent tubes and Compact Fluorescent Lightbulbs both work the same way; high voltage electricity excites mercury vapor inside, creating a plasma that emits ultraviolet light. A phosphor coating inside absorbs the UV light and emits it again in the visible spectrum as white light.

Besides shape, there is one more technical difference between most CFLs and regular tubes is that CFLs often have the 'ballast' integrated into the bulb, so they can be used in standard fixtures. Fluorescent light fixtures have the ballast built in, but light fixtures built for incandescent (filament) bulbs don't.

Answer 4

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