I think the key here is to not have a light on inside the coop after the sun goes down. If the chickens are outside and the sun goes down and they can still see the light from inside they may not realize it's time to go in for the night. So, they stay outside messing around ... then, all of a sudden the night lite goes out and they are in complete darkness. They can't see and don't know where to go. If they are allowed to use the sun as their clock they will know when to put themselves away for the night.
If you are going to use a night lite then you need to put the chickens away yourself before the light goes out OR don't turn the light on until after all the chickens have put themselves away for the night.
Most people that use a light to stimulate egg laying through the winter months have the light come in in the early morning hours and don't use it in the evening. In other words they add the extra light in the morning for the girls to wake up to.
Just as a side note .... I'm with the thought that chickens should be given a 'rest' during the winter months and not 'forced' into egg laying through the use of artificial light. By using lots of windows you can keep up pretty good laying and still give your girls some rest. Obviously, many people use lights to stimulate egg laying ... it's totally a personal thing.