While they do produce bright white light with good color rendering, light output, color rendering, and efficacy all drop dramatically over time high bay lights price list.

That doesn't exactly make it an option that was once considered economical.

Next up: Linear Fluorescent Lights - the next best option. But still bad.
Many facility managers are so familiar with metal halides that they are ready to accept anything as a replacement. That's where linear fluorescent lighting comes in. It started with the T12s and has since evolved into the more energy efficient T8 and T5 lamps high bay lights manufacturer.

5 reasons why they still haven't made it
They are more efficient than metal halides, but still not as efficient as LEDs. (PS - LEDs save 65% over metal halides; fluorescents only save 15%.)

They perform. As long as you keep the ambient temperature around 77 degrees Fahrenheit. Anything hotter or cooler than that, efficiency plummets.

Since they contain mercury, you must dispose of them according to strict regulations.

They attract dirt, which reduces light output by 10%. Not to mention, cleaning up these guys requires time and money that your clients don't have ufo high bay lights.

They require constant relighting and reballasting, which is annoying and expensive. Just like metal halides, your customers will need special lifting equipment, increased labor costs, and a place to store and manage replacement parts. This is a waste of precious time and space. Of course, in a 24/7 facility, all operations must stop when fixtures are replaced.