The Hi-Tech Lamps part number 64339B is a 105 watt (105W) current controlled halogen lamp made by Osram. It is intened to operate on a circuit providing a stable 6.6 amp current (6.6A). This lamp has a maximum overall length of 45.6mm. It is a MR16 bulb with female round connectors. The average rated lifetime of this lamp is 1000 hours. This lamp is also known as Osram 6.6A/105MR16/64339B and 58961.