I bought a tacking iron from silverprint in the UK with a scepter tip. It is labeled as being 25 watts. The manufacturer Litesold and the instructions both refer to this "tacking iron" as a soldering iron. The manufacturers Homepage also shows this identical "tacking iron" and called it a soldering iron with a "melting tip" (sceptre tip). No way does it reach the temperature of a normal soldering iron (400°C) though.
Who knows. It is labled as 240V, I had to replace the UK plug with a German plug and it works like a charm.