Electrical novice here so please bear with me and use layman terms.  I bought 14 of these lights on ebay:
http://www.ebay.com/itm/151190332123?_trksid=p2060778.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

I connected them to my accessory 16v ac connection on my Bachmann DC controller.  All the lights come on for about 7 seconds and then go off.  I then have to wait a few minutes before I can turn them back on for another 7 seconds.  It's like they are overheating or pulling to much power.  I really need help.

Thanks