Can only assume you believe you could cycle outside where you live in darkness. Ditto me where I live.
Not on a farm track. Which I undertook on Tuesday evening ( albeit walking )
On the road, it's difficult to say. Unless in a powercut situation. The roads have plenty of street lighting.
I live in a city, the bright lights in the distance didn't give much help in the slightest.
As for ambient light, a total non starter.
Also made a short video.
Having trouble uploading to the forum. Keeps saying timed out as said to you yesterday.