1. Is runway edge lighting mandatory for Private NVFR departures either here or in The USA?
2. Is it legal to take off NVFR without runway edge lighting in any circumstances (mercy flight perhaps)?
Eighteen years since I was current
Q1. Don't know if it's mandatory today but it would be decidedly stupid to not have lighting for an immediate return should that be necessary
Q2. Mercy flight you could do what ever you thought necessary, rules didn't exist, though you may have to explain yourself to the authority
Q3. NVMC - unless the rules have changed and mention celestial lighting, what horizon?