Is this blown?

[Lowefx]

This is my 150w DE MH bulb. I'm not sure if its blown or if the ballast is toast. Ballasts are only 2 years old. I'm leaning towards a blown bulb with the dark spot. Please advise.

 

[recess62]

Do you have a multimeter? If yes use the continuity setting

 

[Lowefx]

Do you have a multimeter? If yes use the continuity setting

Isn't a MH bulb lit with gas that's within the bulb?

 

[recess62]

Isn't a MH bulb lit with gas that's within the bulb?

Dang. My bad. No filament duh. Lol

 

[Dana Riddle]

It's not unusual for a MH lamp to develop spots within the arc tube, usually due to sputtering of the electrodes. If no damage is obvious, it's probably not the lamp.

 

[Lowefx]

I have new bulbs on the way. If it still doesn't work then it's the ballast.

 

[Lowefx]

I got the new bulbs and still not working. I'm getting replacement ballast in 2 weeks. Ducks, but I'll still have one other light (50% power)

 

[Lowefx]

Yep, ballast blew. Replacement is in wand running again.