So I have a 1994 Mitsubishi 3000GT with headlight bulb usually blowing out fast

Hello all my name is: Brolee
I have a: 1994 3000GT Base Model
The problem is that my headlight from the passenger side keeps blowing out. Its the low beam which im getting frustrated. I know is not the bulb because usually it last for awhile until it just blows out of nowhere when the battery gauges reach to above 12volts. I haven’t gotten the change to see further because of work and usually cold weather where im station at the moment. Thank you hope to hear from you.