T5 Lighting issue

[olsenshouse]

I have a MH-T5 Current USA fixture. It has 4 T5's and 2 MH's. I just bought all new bulbs. 2 of the T5's work just fine, the other 2 flicker and turn off. The bulbs are double prongs. Am I doing something wrong?

 

[eww]

Every time I have seen this it has been the ballast or driver going bad. Not sure if this is what is happening with yours but it is just my experience.

 

[olsenshouse]

I just found it strange it didn't start happening until I changed out the bulbs.

 

[returnofsid]

Actually, rather than a ballast, this problem is usually caused by bad end caps. I've experienced this several times. The first time, I thought it was a ballast issue. Bought a new ballast and replaced what I thought was a bad ballast, to only have the problem persist. When an end cap is going bad, it may not show up, until you've changed bulbs, disturbing the faulty end cap. On your fixture, I'm not sure of the procedure, but on Sunlight Supply fixtures, changing out the end caps is very easy.

 

[thatguy559]

put the old bulbs back in to rule out the ballast and the end cap if they work then the bulbs are bad

 

[Webos]

One other thing to try is to take your known new good bulbs and put them into your sockets that your having a problem with. It could just be bad bulbs as well.