I can provide my details for research on insomnia, but I would probably prefer not to show my card here too openly.
Maybe we also should consider, that planets may behave differently in a chart of someone who was born during night-time vs. someone who was born during day-time, depending on their position below or above the horizon of the native. or if they are west or east from the sun in the birth chart (aka "morning" or "evening" star regarding venus, but this may hold true for other planets as well)
christian
Somewhere I´ve learnt - wasn´t that Ernst´s teaching? - that an overactive Mercury may cause sleep problems; a Mercury that doesn´t go to rest.
Mattias
@Scott-M-19 though it is old thread - just thought of sharing my exe on sleep, I agree with you on 12th house connections with sleep - Ernst relates 12th house to bed pleasures (not the sex) and it is also house of post worldly affairs matters at the end of the day (sleep being one of those) so I assume good bed (good 12th house factors) helps induces good quality sleep if connected well with other factors like Mars (Nervous systems) and Moon (Manas) and if you are running their active periods you will exe quality of sleep depending on health of these planets, if you notice you will have periods or days where you will have good sleep and not so good sleep or no sleep at all depends on what you are running on 5th level dasha .
It does not matter what planets are influencing 12th house factors as far as sleep in concern (criminal sleeps well too in the jail ) what matters is they should be good healthy planets overall , you will often see if 12th house is not good, people often don't enjoy vacations (they dont get sleep there too 🙂 ) because it is their inability to disconnect their mind with actives world .
12th House is toughest of all - The ultimate goal ,so it is not that easy to get a good night sleep (moksha) 🙂
Now, quantity of sleep is all together is very complex i guess only @ernst can explain it - but if your 12th factors are good whenever you will fall sleep you will get awesome sleep for sure . You will notice some people fall asleep in less than 1 minute at their will
God bless
Yogesh