There are a few things that could be the problem. If you notice that other electrical appliances are not working properly, I would check to make sure that the incoming neutral wire in the main electrical panel is tight. A loose neutral connection can cause this phenomenon.
If everything looks OK, I would check the wiring to the lights. Sometimes older buildings have a wire size that is a little too small. This is usually just a symptom of an older swelling wired to accomodate only a few items (one or two lights, a few kitchen appliances, and the occasional vacuum cleaner) now having to pull a LOT more load (computer, tv, HVAC, etc). This can be remedied with a rewiring job (not too cost effective unless a total remodel is planned and this can be thrown in with it).
Finally, if none of these are the cause, I would take a look around at the electric utility serving your building. If there are any large foundries in the area, their melting processes can be causing a phenomenon known as voltage flicker at your facility. Call your local utility representative and discuss the situation with them if this is the case. They might be able to attach some load monitoring equipment to verify whether or noth this is causing the problem. .
On my Lexus I had an issue with the lights staying off when it was cold. This was the case for all of my dashboard lights. Then they would flicker back on. There are Caps on the board for the instrument panel that were blown. This was the case for my fuel cage that didn't work consistently work as well
What are the advantages of stress interview?
Why the story entitled origin of fair complexion and fair hair?
Ano ang kahulugan ng iskolarling pagpapahayag?
What is a classified data spill or negligent discharge of classified information?
Ano ang papel na ginagampanan ng mga impormasyong ito sa mapa o sa globo?