I remember considering it with my DS and even once set the alarm for 4am to do it...I tried but he still woke up so I chose to not set alarm for so early again!
Sorry, that's not a success story...but what did make a difference for early waking for us is nap routine...EW often happens around nap transitions for us. Could your LO be in need of a routine change?
Either that or it could be waking from hunger. Real or habitual. Do you need to feed to resettle?
Or morning light? Do you have black out blinds/curtains?
How old is your LO?
This link is also helpful :
Early Waking