Choosing the right lumen output of an LED fixture to replace conventional light sources isn't a simple formula. There are many things to consider, including initial lumen output, optical efficiency and lumen maintenance.
When purchasing LED lighting, read the warranties carefully. Most warranties do not cover when an LED fixture does not meet its advertised performance, leaving you in the dark, light-wise and warranty-wise. Unlike most, Flex Lighting Solutions provides a true and transparent 5-year lumen maintenance warranty.
Now as LED lighting is becoming a mature technology, time has proven sheet metal is a bad choice for most parts of an LED fixture. Always look for LED High Bays made with aluminum heatsinks. They are the most dependable, deliver higher performance and enable a longer LED life thanks to their superior heat dissipation.
Many LED fixture manufacturers contradict themselves by enthusiastically explaining how their drivers have a built-in surge suppression but then later recommend an additional surge protection. So, do you really need it?