Our new optical lens high bays are great replacements for 400W to 1000W MH/HPS bulbs. The lights themselves come with a hook and cord mount that is easily installed by an easy install screw on hook. The aluminum diecast helps dissipate the heat while keeping the fixture much cooler than other high bay lights prolonging the longevity of the light. Furthermore, the LED diodes EACH have an optical lens to provide a bright and accurate 90 degree beam angles. The lights are top of the line and come with a 5 year warranty.