Hi all!

Long list sorry, but im very interested..
1. Is it dangerous?
2. Does it stop you *properly* sleeping (eg. are you tired after)?
3. When i was young used to imagine a light switch, white with cream background that I used to 'flick' (i never saw my hand..) to take myself out of a dream - was this a lucid dream (or close)?
4. I used to remember every detail of my dreams but now i rarely do... could i get but that remembrance easily?
5. I see black in between my dreams. All the time - I thought this was normal until earlier when i was talking to a friend about dreams, so he told me to google lucid dreams (which is why im here ).

thanks in advanced.
Sam