Dining room light. Worked fine yesterday. Put a smart bulb in it last night and it wouldn’t turn on. Bulb tested fine in another fixture. Put original crazy fluorescent bulb back in and that won’t turn on now. No breakers tripped. Switch (not a dimmer) feels normal. What is going on?

EDIT: I guess it was a little corrosion from not having the bulb changed in 6 or 7 years. I tried a third bulb, cranked it in a little harder and moved it around to clean the contacts and now it works with whatever bulb I put in. Smart bulb is working fine, although Google Home said that it couldn't help me with restaurant reservations when I asked it to adjust the brightness...