What are the consequences of sleeping late and not enough sleep?

Inadequate sleep: Consequences can include weight gain, depressed mood, memory impairment, health problems (diabetes, hypertension, etc). Poor quality of life and daytime sleepiness and fatigue.

So tired, tired: Sleep phase advance can make adaptation to daytime schedules difficult due to low energy, poorer concentration, and "not being on your game." optimal times to socialize are during the work day - to developing social contacts and dating would be compromised. This pattern prolonged can alter circadian rhythms with lapses into sleepiness during the day. If actual sleep deprivation occurs, watch out.

Adrenal exhaustion: Adrenals need sleep to nourish - by depleting sleep can create chronic fatigue, lowered immunity, low gut serotonin with mood changes.