I've just recently set up a small veg room and I pulled my 150 watt metal halide bulb out of the closet to use again

But it only runs for about 4 minutes then shuts off, what is causing this?

you arent blowin a fuse or fliping switches?

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Well being that I have to turn off the power to the ballast one the light shut's off. I can definitely say that no I am not flipping switches, and have not blown any fuses/circuits

damn idk. Is it new cause it sounds by da way you said it it's a new ballast?

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First off your not giving much info.......like is the ballast turning off or just the light.
It could be either. A light with a bad starter will try to start then recycle.
Just to make a wild guess on limited info......I would get a new bulb so you can eliminate the bulb. If the new bulb wont start then there must be a problem with the ballast.
Good luck.

well i purchased the ballast back around may I think. I used it for a while then put it in my closet and haven't tried to use it until just recently.

the ballast 150 Watt Metal Halide Ballast - 120, 208, 240 & 277 Volt - Sola # E-MCA00W151 Light Bulb

the bulb 150 Watt - Metal Halide - 4000K - Coated - MH150/ED17/C/U/4K - Plusrite #M01506172402 Light Bulb

The light when turned on warms up then runs about 3/4 minutes then shuts off, I can hear the ballast still running if i listen.

I can try again and the light will turn on couple minutes then off again, you think that it is a problem with the light bulb then?

I don't know for sure if the bulb is trying to restart after it shuts off because i know that MH bulb's can't immediately restart, they must cool down a little and wait.

Any other info needed?

how old is the bulb ... are there any fragments inside the bulb ....

the bulb and ballast were purchased at the time time around may of this year , I just checked the bulb and there are no fragments, however the outlet is an old two prong one, without a ground.

So since it had no ground i ran a 10' extension cord to a nearby grounded outlet, and the same result occured on for 3,4 minutes then bulb shutdown occurs

I would try getting a new bulb and see if that stops it, but you shouldn't have to replace the bulb yet. So either way you kind of got screwed either they sold you a crappy ballast or a crappy bulb. I hope for your sake its just the bulb thats the cheaper fix.

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