I've noticed one thing that I've heard little about over the span of my lucid age of around a year, which is that worse sleeping conditions (cold, hard matrass, no matrass) seem to increase the frequency of my LDs. I've got three examples for that, and a lot of my other LDs were WBTBs, so I don't have much more evidence, but here we go:

On holidays in Croatia, where I stayed for a week, I had a terrible hard matrass (almost impossible to sleep on). However, after my first night of sleep, I started having incredible numbers of LDs during the night, mostly several in one night.

Secondly, my last LD was in a cold basement, sleeping on the carpet with a thin blanket. I had one of the most vivid LDs I ever had.

Lastly, I had an LD at a friend's house, sleeping outside on a garden chair which didn't recline well, with a llama farm further up the hill the house was on making a lot of noise (bells) together with the insects. It took me hours to fall asleep, but when I did, I had another lucid

It seems to me that every time I've slept in bad or terrible conditions I have a massively increased chance of getting lucid. I'm not too informed on the topic, but my guess would be outside noises/lighter sleep. Anyone have any theories as to how this could be or have experiences like these?