i have 1 light in our bathroom and it keeps blowing bulbs, i recently replaced the whole fixture and it kept blowing bulbs, i then rewired it all the way to the trip box,new wire and a new trip 20 amp, still blows bulbs, a bulb will lsat about 1/2 hour left on if tuned off blows instantly when turned on any ideas? p.s all other lights thru out the house are fine thanxs , Doug