Cooking popcorn using a microwave

Grabbing a warm coffee mug to warm your hands

Heat from a fire warming your hands

Heat from the sun hitting a solar panel

Putting an ice pack on an injury

The handle of a pot becoming too hot to grab as it cooks on the stove

Warm air rising off of the pavement

Warm water rising to the surface of the ocean and cooler water sinking

Conduction

Convection

Radiation

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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.