Didn't see this myself (I'm over in Oxfordshire so a bit far from Lake Tahoe! 😄), but I'm really curious about the details here.
When you say ". Weird lights" - were they moving in formation, or more erratic and unpredictable? I ask because there seems to be a big difference in reports between structured craft-type movements and the more plasma-like phenomena some researchers associate with atmospheric anomalies.
Also, what time roughly? I've been cross-referencing a few American sighting reports lately and there does seem to be a cluster of activity around large bodies of water at the moment, which is interesting.
A few questions if you don't mind:
Did you capture any footage, even on a phone?, Were there any other witnesses with you?, Did the lights make any sound, or was it completely silent?, Any unusual physical sensations - heat, static electricity, that sort of thing?
The reason I ask about physical sensations specifically is that I've been loosely following some research connecting UAP sightings to unexplained heat phenomena, which ties into my own area of interest. Probably a stretch, but you never know what connects to what in this field.
Lake Tahoe's altitude and the water below could potentially create some unusual atmospheric conditions, though I'd be hesitant to just write it off as that without more detail. Would love to see any photos or video if you've got them!