1. Energy Saving
Now efficiency of LED can be over 100lm/w in the market. In the lab, efficiency of LED is over 200lm/w. It's over 10 times higher than efficiency of incandescent bulbs, which is also 2 times higher than efficiency of CFL bulbs.
It means, if you replace incandescent or halogen bulbs by LED, you save over 85% electricity cost. If you replace CFL bulbs by LED, you save over 50% electricity cost. Please find a cost calculation below.
2. Long Lifespan.
With LED solid state construction comes durability and exceptionally long life. For example, a properly operated red or yellow LED can maintain up to 50% of its initial brightness after 100,000 hours. The classic LED - a radial design with its characteristic wire leads - set the standard for miniature light sources. However, new surface mount technologies (SMT) have eliminated external wiring, allowing even smaller LEDs to be mounted directly to printed circuit boards, and resulting in more durable modular systems. System durability is critical for taking advantage of LEDs' long service life, and becomes important in demanding applications like traffic and automotive signal , or situations where lamp replacement costs are high.
Usually, lifespan of LED for lighting is over 50,000 hours.
Everyone hate harmful products. CFL contains mercury. So, it bring some environmental problems.
LED is eco-friendly. LED lighting does not contains leads, mercury, argon, xenon or krypton gases.
4. Design Flexibility.
Because LED is very small, it's very help for the design of lighting. It's easy to populated onto printed circuit boards
5. No starting delay
6. Can be easily dimming
7. Silent operation
8. Low-voltage power supply (increased safety)
9. Cool light: In contrast to most light sources, LEDs radiate very little heat in the form of IR that can cause damage to sensitive objects or fabrics. Wasted energy is dispersed as heat through the base of the LED.
10. Shock resistance: LEDs, being solid state components, are difficult to damage with external shock, unlike fluorescent and incandescent bulbs which are fragile.