how is CFL bulb made?how it became economical?

Question

y does it consume less power?

Answer 1

Compact fluorescents are very like ordinary fluorescent bulbs (see refs.) but with smaller, coiled tubes and reduced-size electronic components (starter, ballast) hidden in the base. The price has fallen because of the huge volume they are now made in. They use less power for the light they produce because the light energy is emitted from an ionized gas (and converted to visible light by the phosphor coating inside the bulb) instead of from a heated wire as in conventional light bulbs. This is a more efficient process because it generates far less useless heat, which you can confirm for yourself by feeling one and comparing to the very hot conventional bulb. They also save the consumer more money by having a very long lifetime, typically 10,000-20,000 hours compared to 500-2000 hours for conventional bulbs. Another advantage is that they don't heat the socket they are screwed into nearly as much, resulting in longer socket life too.