a question about metal halide bulbs

[Tom R]

I agree with Delphinus

I had the same problem with my ML

Sounds sort of like what happens when you use a pulse-start lamp on a probe-start ballast. Do you see any markings on the ballast? If it says M57 then it's a probe-start. If it says M137 or M135 then it's a pulse-start ... odds are *pretty good* though that you have a probe-start ballast

Check your ballast and lights for compatibility.

J&L show the type of ballast required with each of their lights.

Tom R