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I've struggled with mornings my whole life, but never had curtains really. I have blinds now but insist they're open so the sun comes in. I don't wake with the dawn but winter is impossible without some light. In summer, I wake up easier as there's a couple hours daylight before my alarms go off.
It just feels like my body needs 3-4 hours' warm-up before I'm always able to function! I wish I could become a morning person.
Have you considered a smart bulb? I was the same but I bought a "Yeelight" Smartbulb (Chinese brand, from Xiaomi the phone brand) fairly cheap and use something called IFTTT to make it turn on in the morning and gradually get brighter.
Was a god-send in the winter months where it's normally pitch black still.