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high-sodium lamp(Niobium tube) , high luminous efficiency, low power consumtion, long service life, good photochromism, white-golden ray that penerates fog at ease, color temperature 2300k.
existing wattage :50,70,100,150,250,400, average life:8000-16000 hours. Base:E40 or E27, the luminous flux could be made as your require,
Available for lighting at the road, airport, wharf, station, factory, mines. etc.