I am asuming that these are mini spot type downlighter bulbs that are blowing
If they are this is common and often caused by poor ventilation in areas and they overheat and blow
One possible solution is to try buying a lower wattage bulb which will run cooler
Also what else happens when the bulbs blow, are they black or is it just the filament that goes
Also does the each breaker trip when a bulb blows