... 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 lighting the places of stadium,exhibition centre,large size department store,play ... and public squares.Other Wattage:175W(E27/E40),250W,400W. metal halide lamp