With such a small load, you'd get away with something like a Tip31 power transistor (and place a diode in for any inductive kickback ) and a 1k resistor to base.
Although prices are coming down fast for fets check out this..http://www.ebay.com.au/itm/10A-400V-N-Channel-Power-MOSFET-Fast-Switching-IRF740-/150975673259?pt=AU_B_I_Electrical_Test_Equipment&hash=item2326d9f3ab
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