i want to make a switch using a darlington transistor so that when i touch 2 contacts it triggers a relay to turn on a lamp. would that work? im using 120v ac. how many amps would the relay need to handle?

 

Here are a bunch of circuits - http://www.discovercircuits.com/C/capacitance-sw.htm

 

Like this ?

http://www.lowes.com/lowes/lkn?action=productDetail&productId=127984-1372-M-102&lpage=none