FLUORESCENT LAMP FOR USE IN AQUARIA

摘要

FLUORESCENT LAMP FOR USE IN AQUARIA A fluorescent lamp produces light having colour coordinates within an ellipse (A) about 22 standard deviation of colour matching around the colour coordinates (B) x = 0.344 y = 0.302. The luminescent layer of the lamp comprises a mixture of: magnesium fluorogermanate activated by manganese as red emitter; calcium halophosphate as white emitter; and a blue emitter preferably strontium pyrophosphate activated by divalent tin. The layer may alternatively be a mixture of red emitting magnesium fluorogermanate and blue emitting barium titanium pyrophosphate. Other blue emitters are disclosed.