i've found a great deal on aircraft landing lights, too good to pass up, but the whole power issues behind these confuses me. the lamps are 28 volts 450 watts. from what i understand, if you wire up 4 in a series it makes a standard 120 volt circuit. but do you add up the wattage with it, or does that stay the same? would 4 of these lights be 450 watts, or 1800 watts? power is the biggest issue where i'm using these at....of course adding another dimmer or two is another problem.