We had downlights in one of our investment properties but they always seemed to blow the bulbs. I have no idea why. Someone said it was because they kept overheating.
I've had the same problem in an IP where I had downlights installed in a new house. They were a Bunnings product that has the screw out bulb. Last time I inspected the IP the tenants had replaced them with the spiral flouros - which looks ugly. Are these notorious for short lifespan?