Technical Information Tungsten Halogen single ended No. DO 4040 Edition: 04/06 - subject to change 64818 (230V) Supersedes: / Status: valid Product description The OSRAM 64818 is mainly used for studio, film and theatre. Technical Data Lamp / order reference 64818 ANSI BCM LIF CP/99 Rated lamp wattage W 20000 Rated lamp voltage V 230 Average life-time h 400 Color temperature K 3200 Luminous flux lm 580000 Luminous efficacy lm/W 28.5 Base G38 Diameter d mm 100 Lamp length L mm 560 LCL a mm 354 Filament dimensions (w x h) mm 67 x 50 Type of filament C-13 Lamp operation Max. pinch seal temperature Burning position Display/Optic Berlin °C 350 s45