People should brush their teeth in the dark in order to get a good night’s sleep, says one neuroscientist.
According to Professor Russell Foster of Oxford University, the fluorescent light in bathrooms wakes people’s bodies up, just when they should be winding down for bed.
He suggests that something as simple as people brushing their teeth with the lights off could help them to fall asleep more quickly.

Very true that.

I never put the light on when I get up for the toilet through the night.

As silly as it may sound there could be some truth in this.

Worth trying out but it many lead to some minor bathroom accidents

Worth trying, definitely need help to sleep. I've tried everything hopefully this works.

I don't know man, how long do you brush your teeth for? I can't see how 2 minutes of having the lights on in the washroom instead of having them off would have any effect. Only if you went from sleeping to brushing your teeth, if you're already awake and just finishing up from say watching TV I don't think you'd notice a difference. Granted I take my phone and iPad to my room when I sleep so even after brushing my teeth I'm still looking at a light I guess.

Lights off also saves $