the routine they in is the only one they have know but they are older now and will both understand that certain things must be changed,put the night lights in read them a story but explain to them every night that they have to stay in there own beds and that you are only an ear shot away if they need you,they abviously need to feel close to you but you have to make it clear that your bed is yours and theirs is theirs,it might take a few nights tempers tantrums and tears but with persistance you will get there good luck
I think it is normal to want mom at night, but every night is a little over the top and I'm sure it wares on you...even though you love them! I think the night light thing is just fine and as for them bothering eachother at night, do they have separate bedrooms or do they share? If they share you may try to put them in the same bed and let them comfort eachother. Tell them if you have to come in and get them to stop harrassing eachother you will take away a nightlight and they are not allowed to come to your room. You may also try developing a nighttime routine. Read a story or two sing a song try making them warm milk or taking a warm bath before bed. Let them listen to calming music. My last idea is you go to their rooms for a while and tell them you'll stay untill they fall asleep. Try this couple nights and see how it goes. Hope this helps...keep me updated!!!