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Comparing LED, CFL and Halogen Globes

What are LED globes?

LEDs stands for Light Emitting Diodes and they are the very the latest in lighting technology - in fact LEDs will undoubtably form the future for all lights. While old-fashioned (incandescent) light globes passed electricity through a thin wire filament, LEDs produce light by passing an electrical current through a special material called a 'semi-conductor'.

Advantage Most energy-efficient type of globe (use 90% less energy than traditional incandescents).
Advantage Have a very long life (up to 50,000 hours).
Advantage Give out light almost instantly when switched on.
Advantage Work well in low temperatures.
Advantage Are dimmable.
Advantage Come in various colours.
Advantage Small size.
Advantage Very durable.
Advantage Have low heat emission.
Advantage Are non-toxic.
Advantage Do not fail instantly but start to dim.

Disadvantage Still the most expensive type of globe (though the cost is coming down all the time).
Disadvantage Low quality LEDs give off harsh light.

LED globe

What are CFL globes?

CFL stands for Compact Fluorescent. In a CFL globe there exists argon and mercury vapour inside spiral-shaped glass tube which is coated with a fluorescent coating. When electric current runs through the vapour, the gas gets excited and generates ultraviolet light. The ultraviolet light hits the fluorescent coating which then emits visible light.

Advantage Energy-efficient (60-80% less energy than traditional incandescents).
Advantage Reasonably long life (up to 15,000 hours).
Advantage Come in various colours.
Advantage Low price.

Disadvantage Do not work well in low temperatures.
Disadvantage Are non-dimmable.
Disadvantage Contain toxic chemicals.
Disadvantage Are very fragile.
Disadvantage Take time to warm up.
Disadvantage Are quite large in size.

CFL globe

What are halogen globes?

Halogen globes work very similarly to traditional incandescent globes. The outside of a halogen globe is made of a quartz (which is stronger and has higher melting point than glass) and inside is a tungsten filament with halogen gas. Halogen globes operate at very high temperatures.

Advantage Work well in low temperatures.
Advantage Are dimmable.
Advantage Lowest price.
Advantage Give out light almost instantly when switched on.
Advantage Bright with excellent colour rendering index (superb for outdoors).
Advantage Small size.
Advantage Non-toxic.

Disadvantage Energy-inefficient (20-30% less energy than traditional incandescents).
Disadvantage Have a short life (up to 3,500 hours).
Disadvantage Get very hot.
Disadvantage Have very intense light (can cause serious eye injury when looked at directly).
Disadvantage Cannot be touched with bare hands.

Halogen globe