Do you have to sleep early in order not get bags under your eyes or can really late for example at 3am and wake up 11am still 8 hours of sleep?

The amount of sleep you get, not the time of day you go to bed, is what determines whether or not you will get bags under your eyes. Going to bed at 3 am and waking up at 11 am will give you the same amount of sleep as going to bed at 11 pm and waking up at 7 am, and both options will be equally effective in preventing or reducing bags under your eyes.