Battery im using is a 12v 22ah, so would i need a switch that states 22amps or more? & obv 12v.
The 22aH refers to the capacity of the battery. Think of it as being a statement of the size of a fuel tank. It tells you almost nothing about the current that it can deliver, what it can deliver has sweet nothing to do with what any individual bit of circuit will draw.
Since almost every switch made is good for 12 volts, that is taken care of. Switches do have two other ratings.
One is for how much current that they can carry when settled "on".
The other is for how much they will reliably live through when changing state.
When the contacts are close together, they can arc, this usually happens when the circuit is being broken as the flowing current hops over the small air gap. But most switches have a bit of contact bounce, and a single operation is more like a round of applause, being a series of makes and breaks.
The light part will take less than 100mA, whether it is a GoW bulb or a LED with a limiter, and is fairly independant of the load being switched.
Usually, what will handle a lot, will handle a little, so the linked one should work fine provided that the panel it mounts on is strong enough.