pull switch in shed?

I want to put a light in my shed with a pull switch to turn it on or off
The power to the light will be from an existing socket using a 5 amp fused plug
I have a 'one way switch whic has an L1 terminal and a com terminal
Do I connect both Browns (1 from socket the other from the light) to the L1 terminal and both blues to the com trerminal. or do I need a 2 way swithch

Andy Schmid
September 2007