Home Depot here, uses HPS wall packs under the front canopy which makes the front of the store look orange at night. And last night I noticed their parking lot lighting is all HPS and not MH, which ironic because orange is Home Depot's color. I wonder if they did that on purpose, it would be neat if they did. Lowes and most other stores use MH parking and outside lighting. Although, the lighting in the garden center is MH.

The HDs here use LED, HPS, and MH.

The Home Depot in my town is a part of a strip mall. The Home Depot parking lot is lit by HPS and the rest of the mall is lit by MH, so I'm guessing this is done on purpose.