If you want the short of this review...I couldn't be happier with this high bay light. This is the first of this type that I have tried and I am very pleased. For the size, it emits a massive amount of light, which was perfect for my particular application, which is being the central fixture in my automotive paint booth. I blend color temperatures, using 2700K side-wall fixtures, to 4500K floor-level linear lighting, and this became part of an array of over-head lighting, providing that 5000K color temp. Doing this, as I've realized over the years, provides me with the ability to see a very wide-range of nuances in the various automotive spray finishes that I apply. Some color temps bring out pearls better, some bring out metallic better, some holographics, and so on. Anyhow, this particular fixture provides a massive amount of light, yet remains very cool. Now, my spray booth is also continually evacuated of dirty air, so new, cooler fresh air is pulled continually through the space, which may positively affect this. In hand, you can tell immediately that the vented aluminum body is well made, as it is quite substantial, compared lets say, to a traditional T8, T12 type of ballasted fixture of old, or even those LED variants. The light also spreads (beam angle) very softly and broadly, leaving no harsh edges, like a spot light would (as reference). Ultimately, I couldn't be happier with this product and highly recommend it to others. You get a LOT for your money. Enjoy!