ice cap mh ballast (ticking noise on startup)

If anyone out there uses ice cap mh i have a 250w that makes a ticking sound before it starts the bulb it stops as soon as the bulb is on, is this normal? thanks
 
it seems to happen with some bulbs and not others, it must be the lack of a starting electrode in this particular bulb
 
Yes, that is normal. If it was ticking all the time, I'd call the bomb squad. LOL
 
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