The losing battle

Ok so i am about to scream! Lately my son has not been wanting to go to bed when he is supposed to. I will put him in his bed then a little while later he will be sitting on the couch when i come back from the laundry room. I put him back again and begin the cycle over again. Well tonight my husband told me to just let him stay up as long as he could handle it, thinking maybe he would pass out after about an hour or so. Well here it is 12:05 am and the little poop is still awake and running around the living room like he had just woke up! I don't know what his issue is. Last month he started not wanting to go to sleep without the light on. It was a shock to get the light bill for last month, it was way more than normal, we think due to Seth's need to have the light on. He has a nightlight, always has had one. He has his favorite stuffed animals and blankets and all that good stuff that kids like to feel safe. I just don't know what to do anymore! I am so frustrated!