| 摘要 |
A phosphor blend and a low pressure discharge lamp utilizing such a phosphor blend is provided having a lamp envelope 3 having an inner surface 15, means 5,6,7,9,13 within the lamp envelope for generating ultraviolet radiation; and a layer 17 of a luminescent material adjacent the inner surface of the lamp envelope for generating visible light when impinged by the ultraviolet radiation. The luminescent material is a phosphor blend consisting essentially of (1) a first luminescent material comprising gadolinium and magnesium pentaborate, preferably activated by cerium, manganese, and terbium; (2) a second luminescent zinc silicate material; (3) a third luminescent alkaline earth halophosphate material; and (4) a fourth luminescent alkaline earth metal halophosphate material, the components of said blend being combined in proportions which are selected depending on the lamp color desired whereby a full spectrum in visible and CRI values of at least 82 are provided.
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