... more effective light• No glue assembly, built-in power supply with wire connectorshigh quality and easy maintain• Produce less heat, 10 ... on/off switch, detachable power cord• Can be combined use with HPS & MH lights• Hang kits included• 50,000 hours ... -60HzOperating Temperature–20º C to 60º C (–4º F to140º F)Weight3.8KG/PCPacking610*490*190mm, 4pcs/cartonLifespan50,000 hrsWarrantyThree years ...