you only get billed for wattage. if ur plug-in dildo uses 400 watts, and your ur cfls uses 400 watts. they're gonna be the same if they're being used the same amount of time.
Technically, they are equal but a HID ballast draws more than what its rated for. For example, my 150w draws 3.25a which equates to 390w on a 120v circuit. My 600w pulls 5.5a which is 660w.
you only get billed for wattage. if ur plug-in dildo uses 400 watts, and your ur cfls uses 400 watts. they're gonna be the same if they're being used the same amount of time.