I'm going to side with renosteinke here.
T-5 Fluorescents are making a good case for their replacing traditional Low and High-bay lights.
They are virtually shadowless, being run on HF Ballasts also means that they don't cause the same Stroboscopic effect as their predecessors, around rotating machinery.
The new T5 tubes also have a life of around 16,000 hrs.
More importantly, if there is a power sag and the lights go out, you don't have to wait for the bulbs to cool down before they will re-strike.
Redsy,
I'm not really a great fan of HPS lighting, we use it over here for Streetlighting and we are in the process of upgrading to M-H lighting.
The change in lighting at night, is beyond belief!. [Linked Image]