Technical Information No. DO 4325 Edition: 07/08 Tungsten Halogen Lamp for Airfield Lighting - subject to change 64311 Supersedes: 01/07 Status: valid Product description d The OSRAM 64311 is a halogen Bi-Pin lamp with G6.35 base for the following applications: Approach, runway edge, threshold, touchdown zone, runway and taxiway lights a l Technical Data Order reference 64311 LIF J1/59 Maximum operation current A Base 6.0 G6.35 Rated lamp wattage W 36 Maximum initial wattage W 38.9 Average life h 1,500 Color temperature K 3,050 Rated luminous flux lm 600 Minimum initial luminous flux lm 540 Luminous flux after 900 h lm min. 95% of initial value Bulb diameter ( d ) mm max. 11.5 Length (l) mm max. 47 LCL (a) mm 33 Filament type C-8 Filament dimensions (w x h) mm 1.2 x 3.3 Deviation of filament centre mm max. 1.2 (refers to base axis) Lamp operation Burning position Maximum pinch temperature Chromaticity Display/Optic Berlin S 90 °C 350 within white boundaries as defined in Annex 14 to the Convention of International Civil Aviation