Abstract:
A high pressure alkaline metal discharge lamp includes a ceramic arctube and a discharge-sustaining fill. The fill contains rare gas and alkali metal, the alkali metal being cesium, rubidium, potassium or mixtures thereof. The fill is mercury free and cadmium free. The alkali metal vapor pressure during operation is at least 2 atmospheres.
Abstract:
The invention relates to a high pressure sodium discharge lamp. The boiler of said lamp is filled with sodium, mercury and xenon, with a weight percentage of sodium in the Na/Hg amalgam of about 12 % to about 20 %, with a xenon filling pressure in the cold state between about 180 torr and about 350 torr, with a distance to the dome of the two flanks of the Na-D line of the radiation spectrum of about 110 ANGSTROM to about 200 ANGSTROM . The percentage of radiation is about 14 % to about 18 % in the red spectral range at 635 nm to 750 nm. The percentage of radiation is about 7 % to 10 % in the blue spectral range at 380 nm to 500 nm. Said radiation percentages are provided to the radiation power in the spectral range of 380 nm to 780 nm. The inventive lamp promotes plant growth.
Abstract:
The invention relates to a metal halide lamp which radiates light with a color temperature Tc of between 3900 K and 4200 K and with a general color rendering index Ra >/= 90. The ionizable metal halide filling comprises between 30 and 50 mole % CaI2. A lamp can be realized thereby having a limited crest factor, and accordingly a long useful life.
Abstract:
An air cooled double ended high pressure sodium lamp fixture for growing plants in confined indoor spaces. The fixture seals the lamp and heat generated by the same to a reflector interior. Flow disruptors create turbulence in a cooling chamber thereby enhancing thermal transfer into a cooling air stream that flows over and around the reflector's exterior side thereby convectively cooling the lamp using the reflector as a heat sink. The lamp is effectively maintained at operational temperatures and the fixture housing is insulated from the hotter reflector by a gap of moving cooling air, allowing use of the double ended HPS lamp in confined indoor growing spaces.
Abstract:
In a discharge lamp comprising a discharge vessel (1) enclosed with space by an outer bulb (4), a hydrogen getter (6) is used comprising more than 70 % by weight of Y and one or more Y alloys from Al and/or Mn. The getter (6) effectively removes hydrogen from the outer bulb (4).
Abstract:
In a discharge lamp comprising a discharge vessel enclosed with space by an outer, a hydrogen getter is used comprising more than 70 % by weight of Y and one or more Y alloys from Al and/or Mn. The getter effectively removes hydrogen from the outer bulb.