Lighting question...

[1793]

I just installed twelve Lithonia T5 Grid Troffers. These fixtures are two tube 25 / 28 watt 4 Ft.

Observation -- When one of the fixtures lights it only burns for about 3 - 5 sec then shuts down. If I disconnect the Ballast Disconnect and reconnect about 1 min. later it fires for 3 - 5 sec. and again, shuts down.

Question -- is this a ballast issue?

Thanks in advance

 

[480sparky]

Have you tried swapping lamps with some you know are good?

 

[1793]

Have you tried swapping lamps with some you know are good?

No time today, I was going to try that in the morning. I was trying to "think ahead" by picking up a ballast if anyone thought that would be a good idea.

 

[~Shado~]

I would still have a spare ballast or two anyway. As you know...just because something is new doesn't mean always good.

 

[mxstar211]

I would put my money on a ballast issue. If it was a lamp problem only one of the lamps should be defective with electronic ballasts. Plus, the frequency that the problem occurs, and the way you describe it sounds like a ballast. If you do a lot of lighting work or trouble-shooting, they do make a flourescent lamp tester that works pretty well.

 

[mnbiker]

I have recently installed about 90 of these, what I have found is both lamps need to be good and in the sockets proper, found 2 that the lamps wires were pinched in the sheet metal and few that the ballast were not fastened down. in all situations the fixture acted the same way as you described, would light up for a second and go out. good luck......

 

[slick 50]

if the lamp fires fully for 3-5 sec then you need a ballast

 

[1793]

Follow up:

I discovered a bad socket and tube. When I fixed the socket and replaced the T5 everything is working as it should.

Thanks to all.

 

[ceb58]

Follow up:

I discovered a bad socket and tube. When I fixed the socket and replaced the T5 everything is working as it should.

Thanks to all.

I would try looking for a bad socket and maybe a bad tube also

 

[Jim W in Tampa]

We must keep in mind that all parts are subject to being defective. Start with voltage check on input. Past that anything and everything is at question. Gladly come help check it out and visit kin folk at same time LOL