Could a bad seal on a can light cause enough condensation to yield a persistent drip?

Question

Tl;Dr: I have a can light fixture with a water stain that after 20 months just started dripping yesterday. We were told it's likely a bad seal allowing condensation to build up and drip, but I am curious how plausible that is. More details below, but could sealing the can light fix or rule out condensation? Or would it risk catching water from a leak?

I live in a narrow 4 story townhome. The second and third floors are completely finished and on central air. The second floor hasa flat, 12' high ceiling that has can light fixtures sprinkled over it like rice at a wedding. When we moved in, one light had a water stain around it but over the first 20 months of living here it has remained the exact same. We had someone come look at it and best he could figure, it had a bad seal and the cold air from the air conditioned living room was seeping into the space between the floors and causing condensation on the light fixture, resulting in the water stain.

We're in Houston and it's a very hot summer, and just yesterday water started dripping from the light at a good clip; about a drip every other second. None of the other lights have this issue, just the one. To complicate things, this light is directly below a wall shared with a bathroom sink and near the washer drain and the dryer vent. The washer and dryer had both been running along with the AC when the drip started. The washer had finished, we turned the AC and the dryer off and the drip stopped, it started again when we turned just the dryer on, turning the dryer off and the AC back on stopped the drip, then turning the dryer back on did not result in the drip resuming.

The drip had been going consistently for about 20 minutes. So I am thinking

1. The bathroom sink is no longer a culprit.
2. Condensation could be exacerbated by the dryer vent when it's running, potentially causing the drip.
3. The washer drain could be the cause; we need to run it again to see if it for whatever reason has started to leak, but it seems odd that just now we'd have an issue with the drain.

Considering the heat in Houston right now, I'm thinking it's condensation and wondering if fixing the seal would resolve the issue. If it were just renting a ladder and sealing the light, I'd have taken care of that by now. But could there be that much of a difference in temps/humidity between the rooms and the space between the floors that it would cause such a steady drip? If I seal it, could I be creating a perfect drip catch for some other leak and give myself a bigger problem? This is my first home, and I'm scared of taking a misstep and don't even really know who to call. Any input or advice would be appreciated, and let me know if I was sparse in the details anywhere.

Here are photos of the fixtures, as well as a photo zoomed in on the problem fixture:

Answer 1

No (to answer the subject question).

A can light would generate some amount of heat, and the reality I live in and its laws of physics condensation would not be caused as a result of the can light operating (with or without seals).

Condensation is the result of hot and humid air coming into contact with a cold surface

this light is directly below a wall shared with a bathroom sink and near the washer drain and the dryer vent

I live in a narrow 4 story townhome.

Builder did not properly and adequately use insulation. Ccold air from air conditioning, (AC vent within the wall?) is causing condensation of hot humid summer air in your location, then that water is running down where your can light is. Or you have a drain link but is less likely to explain a persistent drip; in the case of a drain leak you'd see more water infrequently as in when the sink is used. Persistent drip is more of the nature of cold uninsulated air conditioning ducts. The can light, with or without a seal, would not cause condensation.