The difference in an outside flood light and indoor flood light... My husband installed track lighting and lighting was going out i was thinking it was a difference in lighting.. I could be wrong but I thought there was a difference in the two!!!
There is no difference between indoor & outdoor flood lights when it comes to voltage. They will all be 120 volts assuming they are not part of a low-voltage kit (12 or 24 volt lights).
You can purchase 125 volt light bulbs that are considered heavy duty.
Are you referring to wattage?
If you look at an incandescent lamp you will see the voltage marked on the top of the lamp. They will normally be rated 120 volt. If you look around you will find some that rated at 130 volt. This lamp will last longer because it is operating at less than its maximum voltage rating. There are lamps that are labeled "rough service" this lamp has extra filament supports and are rated at 130 volt.
Lamps rated at 130 volt will actually use slightly less wattage than rated.