Jeritta, most of the questions you have asked have already been answered in the above post. :wink:
Ponz some of Jeritta questions are relivent, temps and lighting help proper digestion. Since you said you have a MVB in your case it sounds like to me that he over ate. (100watt is that the new T-rex 100 watt or Powersun?) Going from 14-18 crickets ever few days to 30 in one sitting is bound to make anyone throw up. As I mentioned, you want to gradually increase his intake so next feeding try giving him 10 for a few days then 15 so on and so forth, untill he is eattingabout as many as he wants but unless he is grwoing rapidly I would not feed over 50 in one day. (this depends on your dragon, some dragons will eat 100 per day, but thats is unusual) You may also want to spread the feedings out in one, if you can. try 2 feedings in one day when you get to a higher amount of feeders (25 at a time). This will give him time to digest some and then eat some more later.
If he is still vomiting then we need to look at some other things i.e tank set up and so forth. At that time we can also talk about lighting and such.