Characteristic:high in luminous efficiency,long in service life,fine in photochromism.Colour index Ra(CRI)=65.3000k--6000k. first of all:we are manufactory.Characteristic:high in luminous efficiency,long in service life,fine in photochromism.Colour index Ra(CRI)=65.Colour temperture including 3000k,4000k,5500k,6000k.The life time can be 6000hours, 8000hours and 10000hours.Application:suitable for ...