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Hello and welcome to Just Answer. My name is ***** ***** I will be happy to assist you with your electrical question.
1) Either at the wall switch or at the light bar wires, there is a loose wire termination or a faulty splice. Double check all of the wire splices.
2) The light bulb had a reduced illumination and got brighter due to a voltage drop. Loose wires or faulty terminations will cause a voltage drop.
You mention a ballast? What type of bulbs are you using ? CFL or fluorescent tube bulbs?
Is the wall switch a standard ON/OFF snap switch or a dimmer switch?
Thanks for the replies.
1) The light fixture and the tube types must match the ballast. Sounds like an incompatible ballast was installed?
You originally mentioned the following:
"I replaced the first one in the series with a newer fixture that had a smaller ballast".
The only thing I can think of is either a loose wire connection or an incompatible ballast or a faulty ground connection.
I don't want to delay you in my replies, but I will need to opt out of the question. I live in Northern Illinois and we have tornado warnings right now. I need to get into my basement.
I'm sure another electrician will pick up the question shortly..........Thanks............Kevin:)
Hello, welcome to Just Answer/Pearl, my name is***** will try to answer your electrical question today.
When you say the lights are in a series, do you mean the romex is daisy chained to each light , and if you remove the new light fixture from the circuit the existing lights still work by means of the switch without any trouble? I am trying to determine if there is something wrong with the new fixture itself.
You mention this is a standard light , do you have a wiring diagram you can upload or the Lithonia model number ?
It occurs to me that it is possible the lights may be wired so that the light switch is breaking the neutral wire instead of the hot ( a major code violation if that's the case ) because turning on the power at the breaker with the switch off should not complete the circuit the first light should not have come on, if the neutral wire or one of the return leads in the ballast , usually yellow are pinched and are making contact with the frame of the fixture which is grounded it in theory could light the fixture up, this is very dangerous if this hypothetical example is true, the swithc will need to be re-wired for the hot side of the circuit , not the grounded (neutral side)