Hello,

May I seek anyone's advice on how to determine the lighting power density for data hall while there is no criteria in ASHRAE 90.1?

I have ever heard of 0.8 W/ sf (treating similar to active storage), yet, ocassionally some operations would take place in data hall (although not full time), and 0.8 W/sf is definitely not enough for maintenance and operation works there.

Would there be any advice which criteria we could take for comparison?

Thanks!