Getting Started with Fluorescent Bulb
Place a fluorescent bulb in the lamp and then switch on. Now observe the light carefully produced by this bulb which should include the color as well as the heat.
Light and heat produced
Observe the light and heat produced and measure the temperature by holding thermometer about 6 inches away from the lamp. Have the temperature noted as before.
As you compare the two readings, you will notice that the temperature of incandescent bulb was higher than that of the fluorescent bulb. Hence, the bulb that produces a lesser amount of heat is good to use.