The lamp is an important part of the energy-saving lamp. The quality of the lamp is mainly determined by the powder inside. Currently, there are usually rare-earth powders, namely tri-phosphor, 300-400 yuan/kg, fluorescent powder. (Few yuan/kg) and three types of mixed powder, tricolor powder are good or bad, imported, domestically divided, mixed powder is mainly trichromatic powder and phosphor mixed by a certain proportion, the proportion of trichromatic powder is higher The better the quality. The cost of a lamp has also been different, the general phosphor's lumen is only about 40lm/w.
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