Gemini and Marc lamps should be operated with the plane of the reflector vertical.
These lamps should not be operated for periods of less than three minutes since short operating cycles reduce life and degrade performance.
Список условных обозначений
A -- Hemispherical shield in front of filament masking all direct
light B -- Operate at or near horizontal C -- Protect from moisture. Safety screening techniques recommended D -- Replace broken lamp immediately. Inner bulb pressurised and
could shatter unexpectedly E -- Use safety screen external to lamp F -- Operate BDTH G-- Operate BD ±30° H-- 100V rating available to order J -- 120V rating available to order K -- Specially designed for searchlight applications L -- Twin filament lamp. Lumen figures relate to single and twin
filament options M -- Tungsten Halogen minimum bulb wall temp 250°C N -- 3 or 4 amp HBC fuse necessary P -- 5 or 6 amp HBC fuse necessary Q -- 6 or 7 amp HBC fuse necessary R -- 10 amp HBC fuse necessary S -- Due to internal integral reflector nominal lumens not shown T -- Obscured top V -- Due to integral dichroic reflector nominal lumens not shown W -- Axial coiled coil single ended lamps will generally give better
reliability against premature arcing if orientations in which the main support
spine is under the filament are avoided.