Weetabix7 was looking to downsize her t5 retro 36" to 24" and i was looking increase my t5 retro from 24" to 36" so we swapped bulbs and reflectors. Didnt make sense to swap out ballasts and end caps since most 24" t5 ballasts will drive 36" bulbs as well.Got the package today and everything was packed very well. Cant wait to play a round of "whats this bulb combo look like" tonite after i get home from work. Thanks again.