The switch is one of [urlhttp://www.ebay.co.uk/itm/50-110-C-Digital-Heat-Cool-Temp-Thermostat-Temperature-Control-Switch-DC12V-New-/152003309559?hash=item23641a6ff7:g:noEAAOSwBLlVVHA~]these[/url], rated at 10amp 8O I have tried 3 different psu’s and
i bought this latter one as its a 2amp at 12v. In theory, it should work, i can use 3 x 5w bulbs with no issues.
Perhaps a computer PS would be better, or will just have to forget the 16w and just use more of the 5w, shame though as i bought 10 x 16w lol