High-pressure mercury vapour lamps consist of a glass bulb, containing a gas for maintaining a constant temperature, and a quartz mercury vapour discharge tube.The lamps are equipped with a standard screw or bayonet base and one or two auxiliary electrodes to ensure quick and reliable ignition. Apart from a ballast, no special control gear is required.
The HPL-N has an internally coated ovoid outer bulb, providing a cool, bluish white light with reasonable colour qualities. The HPL Comfort has a special internal coating, providing a pleasant white light with increased
colour quality and luminous efficacy.
The HPL-R has a cone-shaped hard-glass bulb with an internal reflector directing the light to where it is needed.
Applications
-HPL Comfort and HPL-N: pedestrian and residential areas, commercial and public buildings, factories, railway stations, schools, shops and petrol stations.
-HPL-R: high-bay in heavy industry e.g. iron foundries, paper mills, mines and quarries; also sign boards and decorative floodlighting.
