Blue frequencies of light suppress melatonin production. Glasses that block the blue spectrum of visible light can be part of dark therapy. There are some on Amazon, as well as night lights and light bulbs that are amber color/free of blue light. Personally I believe luminosity plays a notable role as well in a sleep wake cycle, that it is not simply about the blue frequency.

I am content going to bed at 8-9 and rising at 6, especially as that schedule follows sunset and sunrise times during late spring, summer, and early autumn. There's no substitute for sleep, bipolar or not, and undergoing unending suffering when such a simple solution as 'go to bed early' exists doesn't make much sense to me. Tell your wife it's doctors orders, or point her to the research, or quote Poor Richards Almanac (early to bed early to rise), or just straight out tell her 'I need this to be healthy and happy and not getting this causes irreparable harm to me physically and emotionally' - aka, ask for the consideration and kindness required to achieve personal well-being.

I am easier to live with due to dark therapy. You and your wife might find the same to be true of yourself, even of each other in fact.

Honestly, just think about these options:
- Convince wife to be considerate of unusual sleep needs.
- Ingest psychoactive compounds with detrimental side effects, which range from brain fog to death.
- Undergo ECT, risking memory loss and brain damage

I know which one I'll be choosing for the rest of my life.