Classify the following as those suitable for fluorescent lamps and for arc lamps.
The main part is carbon rods , The heating coil is coated with thorium oxide , used in search lights , more harmful for the environment , more intense light , ultraviolet rays are produced.

Choose and write the facts related to LED lamps from the given list. Require only a small quantity of power , UV rays are produced due to electric discharge , Not harmful to environment since there is no mercury , Intense light is produced when high voltage is applied.

Given below are the steps in the working of a flouroscent lamp. Arrange them in the proper order. Ultraviolet rays are produced , Visible light is emitted , Fastly moving electrons collide with the unionized molecules of mercury, Due to electric current thorium oxide coated heating element becomes red hot .

Incandescent lamp, discharge lamp , C.F.L, LED lamp, arc lamp are given for observation . Answer the following questions after observing them. Which lamp is used in rescue work during night time and used in search lights ?