WOW, this is a lot of 12 (6-2pks) of halogen bulbs.  THese are 50 watt  12 volt JC type halogen with a G4  6.35mm base.  These are used in many applications including undercounter and showcase lighting as well as many outdoor lighting and marine applications.  In each lot you receive 6 packages. Each card or package contains 2 lamps.  This makes the bulb total count of 12.  You could pay as much as $20 for these at retail but I bring these to you for only $5.95 and shipping is $3.99 to U.S. locations.  I have 35 watt in these also.  Check my store for other types and wattages of halogen bulbs. If you would like a larger quantity check out my store.