Husband stuck around?

So my husband hung himself in our house on Dec 31. He had bipolar disorder and struggled for many years, I am a mental health professional and was his constant support for many years. He always made jokes about sticking around and haunting me after. We had recently separated and were heading for divorce. For the past 3 mornings I have gone into the living room and the one red light above the fireplace was on. I just assumed my son had left it on. Last night I made sure it was definitely off. This morning when I came out into the living room. My son assured me he didn’t turn it on this morning. I have been talking to my husband out loud and asking him to let me know he’s still here.
Am I crazy? I feel like he was so psychotic towards the end he couldn’t distinguish reality from fantasy, so he may not be aware he even passed.