The adjoining figure shows two bulbs B1 and B2 resistor R and an inductor L. When the switch S is turned off

Emf is induced in inductor, which opposes the decrease in current due to Lenz's law, therefore current does not become zero rapidly and bulb B2​ dies out with some delay. On the other hand bulb B1​ and resistance R, constitute a simple R circuit , in which as the voltage becomes zero, current becomes zero and B1​ dies out promptly.