I can confirm this effect. One winter I left 2x300w living room lights on perm, and it had a dramatic effect. The only issue is that its nice to turn lights off at night, and if you do that, now you're in habit-dependent territory.

one thing i've been paying the adhd tax on is automating / making habits lower activation energy. smart bulbs / blinds are a great thing for me especially when i am already in bed and have too much executive dysfunction to walk 3 feet to the light switch / shade