The heat of fusion is defined as the energy required at a constant temperature to change 1 unit mass of a 1. gas to a liquid 2. gas to a solid 3. solid to a gas 4. solid to a liquid​

jjj89t'ji; it hink the answer is your mom is not si

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.