1, Im using a propergator with the dome fitted, 2 side vents are open and i have a occelating fan pointing at it to push a tiny bit of air through it, the humidity is at 66% and the internal temp in the propergator is 22-24C, do these conditions sound ok.?

Sounds good

2, how long do i wait before i remove the propergator lid, i read that 60-70% humidity is good, if i remove the lid i struggle to get above 30%, i am able to control the ambient temp of the room and was wondering what the ideal conditions are for seedlings of this age.

Normally 2 to 3 days.

1, Ideal Ambient (room temp)
75F (lights on)


2, Ideal Humidity (room Humidity)
60%

2, Ideal Humidity in propergaror
75%

3, Ideal temperature in propergator
75F (day and night)

4, Lid on or Off
Lid off on day 3, remove bit by bit, that is, take off in stages, by slowly something between the lid and tray so its gradually (over one or two days) removed.


5, Occelating fan on the seedlings/or not (if lid removed)

perhaps indirectly