Having an issue with my HPS bulb. MH bulb works fine. Went to 12/12 and changed to the HPS bulb. Was working ok, then one morning when I went out to check on the grow it hadn't come on. Juice was getting to it since when I replaced it with the MH it went on immediately. Contacted the people I bought it from and they sent out a replacement bulb.

Got the new HPS bulb, replaced it the next am and it lit up fine. Went out the next am, same thing not on and when replaced with MH works, fine.

Just to make sure it isn't bulb issues I bought another HPS from a place local. Yesterday before the timer went on I tried the 2nd bulb again and it worked. Went out this am and same thing, not on. Tried the local bulb, again not on. Tried the MH, on right away.

So I pretty much feel it is a ballast issue. I have a 400 watt digital conversion ballast. As soon as my grow is over I'm going to take it to the local shop to be tested.

In the meantime just thought I would run this by everyone in case there is any suggestions other than checking the ballast.

Thanks
Tatau Reviewed by Tatau on . HPS/ballast issue. Having an issue with my HPS bulb. MH bulb works fine. Went to 12/12 and changed to the HPS bulb. Was working ok, then one morning when I went out to check on the grow it hadn't come on. Juice was getting to it since when I replaced it with the MH it went on immediately. Contacted the people I bought it from and they sent out a replacement bulb. Got the new HPS bulb, replaced it the next am and it lit up fine. Went out the next am, same thing not on and when replaced with MH works, fine. Rating: 5