Or just do like moths do when they see a light: they think it's the moon
And fly close to it... and when the light surrounds them entirely, they think day has come...
Just get yourself a frosted light bulb hanging from a wire on the ceiling...
Or, go according to the following:
Exposing a scene only by moonlight, according to Kodak, is 8 seconds at f/2 on iso 400 film.
Considering a contact print to be "lensless", it could be thought that it would be equivalent to f/1... thus 4 seconds on iso 400 film.
Now, considering that paper is about iso 6...
So the recommendation for iso 400 film gets to iso 6.25 (close enough) with the following sequence: 400, 200, 100, 50, 25, 12.5, 6.25 = 6 stops
So the 8 seconds of exposure go from 8, 16, 32, 64, 128, 256, 512 seconds.
512 seconds is roughly 8:30 minutes... for a full moon and no clouds.
But that's not counting in the Schwarzschild effect (reciprocity failure) which would push the exposure somewhat longer...
As I said, if you don't want to be at it all night, get a light bulb...
Or, if you want to do it using only the power of nature, expose to sunlight like they did in the old days. A contact printing frame fitted with tinted glass will probably do fine.
