I give mine 14 hours light and get an egg a day from each layer starting from 7-8 weeks from hatch.
I got a $4 timer from wally world and you can use the light socket from anything, or a clamp light.
Over 16 hours light they can become overly aggressive.
You want the light to come on BEFORE sunrise and NOT AFTER SUNSET.
Mine usually lay around 3-4, Eastern time.
I don't know if you can sex those quail like Coturnix,
But if the area BEHIND the vent is puffy, Gently squeeze towards the vent,
If you get white foamy stuff, it's a male, usually, unless it's a female VERY RECENTLY bred.
You can try a few times a day if you want, or separate for a day and try again.
That way there is no chance of a "female" having residual "foam."
The more volume of foam, the greater sexual activity from Male.
The foam is NOT semen, but is excreted I think from the kidneys.