40 plant grow room LED vs HPS

I'm starting a 40 plant indoor growroom soon with soil, hoping to produce some very large plants. I wanted some opinions on LED vs HPS and i think I'll probably end up going with LED unless I get strong opinions against it. I'm doing 20 plants in 2 rooms (so 40). Each room is about 135sq feet.

1. How many watts should I use for my wanted end goal of 40 good mature plants indoor.
2. LED vs HPS

Ps. I live in a pretty remote area and getting HPS lights, ballasts etc would be difficult whereas the LED grow lights would be easier. I'm looking at the 'King Plus 2000w Double Chips LED Grow Light Full Spectrum' and purchasing quite a few of those.

Thanks so much in advance.​
 
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