how to connect switch to led driver

Well here's the problem :

Im trying to make a LED light for my aquarium but my electrical knowledge is poor. I would like to be able to turn them of by using a switch.

The drivers I'm going to use have an output open connection and short circuit protection.
(http://www.ebay.com/itm/110800722230?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649)

I was wondering if i were to connect a switch to them, do I have to connect a switch to the 240 input wires or can i also use u cheaper switch and connect it in series witch my leds in the dc part of the circuit?

I assume the best solution for the live of the driver is to connect one to the ac leads?
But if you connect a switch to ac current, do you only have to disconnect one lead or both leads? ( do I have to use a dpst or a spst switch?)

I know these are very basic questions but since its 240 v I would like to be sure if i'm doing it right

 

thank you very much for your very fast reply!

I know I could simply buy a power strip with an on/off switch, but I am planning to make my own lamp with two drivers for two different colors of leds and I would like to be able to turn them on or off separately.