You can but the original lamp for 15.00 a pop (2 lamps for $30) here:


http://www.ebay.com/itm/220830459296...84.m1423.l2649



Or you can buy the equivalent bulb, but not "Leitz" stamped as approved,
the EFN, in a box of 10 lamps for 70.00

http://www.ebay.com/itm/290604550768...84.m1423.l2649