Quick Question, thinking of adding HPS.

Im looking into getting a 150watt hps sun system plug n play system to compliment my 3 68watt clfs and 2 40watt clfs and i was wondering if the 150hps system would show a noticable jump in the electric bill? The clfs dont seem to raise it much at all much but would just the hps system added even at say 150 or up to 250watts make it jump? thanks!

if anyone has a link to a nice plug in and go system (ballast included) for a 150 or 250watt hps, for around 100 id also love that too!