if i remove two of the four florescent bulbs in the fixture would i still be saving energy? when the light is on do the energy boxes still take up the same energy as if some lights were in place?

Light bulbs burn out in just one fixture in the house about once a month, also noticed the insulation was burning up above bulb, and fixture has started to corrode around the screws connecting it to the box and on the shaft that holds up the glass cover. voltage is exactly 120 volts, there are 2, 60 watt bulbs in fixture, fixture is rated for 60w bulbs max. I checked the resistance of the nuetral to ground its about .5 ohms, and also meggered all the wires with a 500v megger all showed good. I just took the fixture down tonight, because one bulb was burned out and noticed it was very hot. There is no moisture getting into the light, its on the ceiling of the 1st floor of 2 story house. Light fixture is almost new, also meggered all the wiring on it.
After reading all your posts, I looked more closley and noticed the air from the room was being sucked thru the light, possibly being in a cold air duct, or just a poorly insulated house. This caused the corrosion, and possibly burned out the bulbs from the extra moisutre, so I sealed the openings. Also being an electrician for 10 years, I didnt realize that there was such a difference in the quality of light bulbs, we do have 2, 100lb dogs that jump off the beds above the room having the problem, I will try a better bulbs also. Thanks for all your responses.