110V--240V UL listed, 3 years warranty HPS/MH, Power Output: 400W, 320W, 250W ... short circuit protection functions available.Easy installationEasy to hang the lamp, no need any external starter and compensation capacitor.Completely silent ... and maintenance free operation.Soft startingDimming function is option.Approval: UL,CUL, EMC, ROSH,CE,TUV. Suitable Bulbs250W, 320W, 400W HPS ...