Ojithi

Hello, I'm Ojith. I'm new to the Forum. I need you guys ideas and explanations on my doubt. I usually work at night. Means about 10PM-3AM. I can and I have an ability to focus my mind exactly on the work I need to do other than day. So, I usually sleep at 3:30 AM & Wake up at about 9AM. It suites my day to day routine. But, I feel uncomfortable and I actually feels lazy and can't focus on work. But, I need to know about is it okay or not to, "Sleep in the Day & Work at Night". Do I actually need to sleep during 12AM-8AM? IS it essential? Do they cause any Health Issues? Is there any Alternatives for my pattern? Thanks