Taxis'companies installed camera are low end equipment....
If it is for your own private use... go ZMC (google search)...
office cum workshop at Serangoon North Ave 5 (industry area). Value
for $$$. Many of my kakis (Viano) go there to get it
fixed.
Yes... you can see clearly even in the night hours... (provided
the background is lighted).
My set got infrared LED. So even in total darkness, the cabin
camera can still take videos of all passengers, including the
driver. And record everything they say.