CFLs (Compact fluorescent lamp) 好處和壞處??!!

好處:
1. Lifespan
Modern CFLs typically have a life span specified between 8,000 and 15,000 hours[1]. Typical domestic incandescent bulbs are similarly specified to have a life of 1000 hours


2. Energy consumption
CFLs use about 20% of the power, and so in the simplest case when compared to incandescent bulbs, they can be responsible for about an 80% reduction in electricity costs and therefore also in the environmental impact of generating that electricity. For example, many 11-watt CFLs are specified to produce the same amount of light as 60-watt incandescent bulbs (approximately 900 lumens).



壞處
1. Cost
In addition to the above savings on energy costs, CFLs last approximately 8 to 15 times longer than an equivalent incandescent on average, thus requiring that fewer bulbs be purchased.


2. CFLs use about a quarter of the energy of incandescent bulbs they are a key part of efforts to fight pollution.

你講0既係日常見到0既慳電膽, 好多資料可以係呢度睇到

http://en.wikipedia.org/wiki/Compact_fluorescent_lamp

慳電膽的優點有很多，包括省電，它比燈泡省電4~5倍。壽命長比燈泡長壽數倍。發光時溫度較低，可以節省冷氣的開支，需然售價會較貴，但整體而言，比燈泡慳錢很多。

但它一樣有缺點，它的構造中有電子零件，亦有水銀、磷等有害的物質，在廢料的處理上對環境有一定的傷害。