You cannot mix fluorescent fixtures and incandescent fixtures on the same dimmer switch.
T8 fluorescent light not working.
How to troubleshoot fluorescent light fixtures.
I have 3 different ballasts and none of them work with the led tubes.
Aside from a burnt tube other factors such as a worn starter and loose or oxidized electrical contacts can contribute to a fluorescent light not working properly.
Like other lighting fixtures fluorescent light fixtures sometimes work improperly.
I got these t8 size led light tubes to replace fluorescent tubes.
A fluorescent tube that is failed or failing usually has darkened areas near one or both ends of the tube.
One clue that your ballast is the reason for a non working fluorescent light is the light bulbs struggle to turn on.
A good way to check that your ballast is the culprit is to turn on a voltage detector and hold it next to the wires supplying power to the ballast.
A burnt out lamp is the most common reason any light fixture does not light.
A fluorescent light fixture that is not working or working well can be caused by several problems.
The no part of this question is that the conventional dimmer switches you can purchase at the hardware store are designed for incandescent lighting only not fluorescent lighting.
Or you can read the printing on the tube to identify the correct replacement type.
Fluorescent lights are commonly used because of their low operating cost.
The new t8 led tubes are not working on my ballasts.
Diagnosing which problem you have and how best to tackle it is a fairly simple job that you can do on your own.