Aradio station's channel, such as 100.7fm or 92.3 fm, is actually it's frequency in megahertz, where 1 mhz = 10^6 hz and 1 hz = 1s-1. calculate the broadcast wave length of the radio station 96.90 fm.

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.