the point is if it fails in a dangerous way, the fuses will trip stopping any power reaching the faulty component.
The morning I was leaving for my trip I had my first bulb ever explode in the hood, a wall fan go out, and a chicken ran away.
I just returned home form a week long vacation. I had a house sitter and a grow sitter, I require quite a bit of piece of mind to be able to relax. My friend camping with me also has a grow and had a house sitter. He got a call that one of his ballast had caught on fire and filled the house with black smoke. Luckily his 3 dogs alerted the house sitter to the situation. It can and will happen, at the worst of times. The morning I was leaving for my trip I had my first bulb ever explode in the hood, a wall fan go out, and a chicken ran away.