argon gas
halogen gas
helium gas
nitrogen gas
40, 60 watts
100, 200 watts
80, 125 watts
150, 300 watts
diameter of the tube
gases in the tube
length of the tube
thickness of the tube
The true power consumption of the circuit is almost zero
A very small current flows in both the branches
The power factor of the circuit becomes 1 and the tube-lights do not flicker
The total current drawn by the circuit is almost zero
street lighting
storage yards
foggy areas
all the three stated above