Light Efficient Design HID LED high bay retrofit lamps are an excellent choice to provide long lasting, energy efficient LED illumination to your existing high bay installations. This lamp is only 140 watts and replaced 400 watt HID fixtures. Being CCT-selectable, this fixture allows the user to easily switch between 3 different white light color temperatures to suit their preference. Their dynamic temperature control with advanced active cooling technology also supports a longer, brighter lifespan of the lamp. They are expertly engineered to work efficiently in enclosed fixtures and in damp environments, while also being protected against insects and dust. 120-277V operation CCT-selectable: choose between warm 30K, neutral 40K or daylight 50K white light color temperature options Dimmable using adjustable dial on side of lamp Replaces 400W HID high bays EX39 mogul base USA designed and specified LED driver Dynamic temp control with advanced active cooling supports a longer, brighter life Pretested and potted drivers are burnt in 3x prior to shipping and protected against vibration and moisture Engineered to work efficiently in enclosed fixtures and in damp environments, while also being protected against insects and dust Enclosed fixture rated 6kV surge protection Operating temperature: -40º to 113º F 50,000 hour rated