My five month old goes through 30 crickets per
sitting. you should feed your pooper as much as it can eat in 10-15 minutes. when she was 4 months she would eat like 50-100 crix per sitting. I think you should feed it more (IMO).
http://www.beautifuldragons.503xtreme.com/Nutrition.html is a good list of acceptable veggies.
A little info on lighting:
http://www.beardeddragon.org/forums/viewtopic.php?f=34&t=114817&e=0
my take on feeders, in general...
crickets - pain in the xss (stink, quick escapers, but cheap)
mealworms - too much hard outer shell, not enough good meat
(hard for poopers to digest resulting in possible impaction)
roaches - darn nice feeder (expensive on the onset, but easy to
breed, relatively slow movers, good meat to shell ratio)
superworms - delicious for BD's over 16ish inches for digestive reasons
phoenixworms - no experience, but from word of mouth they're
healthy for BD's but quite expensive and small
butterworms - nice treat for BD's, very fatty kinda like a
candy bar for your pooper
waxworms - don't like them. my pooper had the runs for days
after i fed a few to her. and she wouldn't eat more than 3 or 4 so i
dont think she likes em anyway
hope this helps