I think that 24 hours of light is another stress factor. Quail can lay with just 12 hours a day and I've read a study where they lay just fine with 2-15 minute periods of light 12 hours apart. The light/dark cycle is what triggers the egg laying and, while I'm sure they can adjust to it, I don't think it's optimal. It's used to stimulate appetite in growing birds, which can be justified (and it's hard not to give them 24 hours of light with heat lamps, though it's red light), but in layers it'll result in higher food consumption for no benefit and can lead to more fighting. It definitely stresses them out more.
You need dark time every day. Sure, you can sleep under full light, eventually, but you sure won't get the sleep quality you'd get in the dark. The more I learn about animals, the more I realise that reducing stress should be our primary goal, be it through handling, diet, housing or environment. Animals perform so much better when we can reduce or eliminate stress for them.
If your set-up works for you and you don't want to change it, don't. There are many, many ways to raise animals and, in the end, how you raise them has to fit your goals and lifestyle. I'm sure many others would disagree with how I raise my animals, but I'm OK with that because I think I'm doing the best I can for them and I'm happy with what I'm doing.