" 1.Why do fire flies glow at night? "

Why do fireflies glow at night

Why can the tiger see at night?

Why do sun and stars glow ?

Why do we have better high radio frequency reception at night?

Why Stars twinkles at night ?

The diagram in Fig. shows the electrical system of a car to operate the two head lights and two rear lights by a switch. shows a connection to the body of the car. The two rear lights as connected in diagram glow faintly. Why do they glow faintly? How should they be connected to glow brightly ? Show by a separate diagram.