Another lighting problem

[Glennrf38]

I found loose wires on my 150W. So I went through all the wires and tightened them all up and haven't had a problem for 1 and a half years

[Black Phantom]

I went through mine as well. Actually I'm very impressed with the wiring and the connections. Everything is tight and all the wiring connections were crimped and then had electrical shrink wrap put on them.
How does the ignitor work in conjunction with the ballast. I thought it was the ballasts job to fire the bulb. What does the ignitor do