Full requirements are in schedule 4 of the ANO.
You must provide internal cockpit lighting - and your instrument fit now becomes an in issue...Unless I am mistaken you must have an AI and TI/TC and possibly a DI. Check out the ANO...
Incidently unless I am mistaken this is part of the CofA and therefore having made the appropriate changes you must get the CofA to certify night flight.
If you fly in controlled airspace there is no difference in instruments from that required for daytime flying.
Hope this helps,
FF