Almost all warehouse and storage areas are lit by fluorescents, whether T12, T8 or T5 - they are all inefficient.

A simple tube swap from fluorescent to LED amounts to 50% savings, and is generally free when subsidized by your utility. Coupled with that 50% savings is something you didn’t realize - that LED is directional light, so those 14 watts of light you are getting out of the LED tube goes 100% towards where it should be going, whereas those 31 watts you are getting out of your fluorescent T8 is going in 360º - with plenty wasted to heat and to the ceiling.