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Here is a little light class.
The only lights that are sensitive to the oil on your had ar halogen bulbs the oil creats a consentrated hot spot causing the bulb to fail. Normal incandecent bulbs does not matter.
Now as far as fixture and bulb wattage goes.
If the fixture says rated for 250 watts you can still use a 60 watt bulb in that fixture. Were you run into problems is when you put a 75 watt bulb into a fixture rated for 60 watts.
all the wattage rating on fixture means is that the contacts and the material are only capable of handling the heat from a bulb that is no more than the rating on the fixture.
there you go.
class dismissed
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