... hundred percent Original production, 2.reasonable prices, 3.quality guaranteed metal halide lamp1.parameter list: Wattage color temperature ... /BT 47/63 257/225 400 4200 135 3.25 33600 8000 E40 ED 91/122 228 ... /292 400 4200 135 3.25 33600 8000 E40 T/BT 47/63 ... life,excellent color rendering,less color temperature shift.3.Application:Supermarket,airport,hotel,city landscape,flood lighting, ...