Check out my post here...
https://www.rollitup.org/t/first-led-grow-bubba-kush-and-cali-hash-plant.925635/
I am growing in a 5X5 tent with an led from Platinum LED. I used to use HPS.
In my experience, HPS yields more for sure. However, with the LED, the buds are much higher quality. Also, the energy use is almost nothing with LED, vs HPS.
So, ask yourself... "Do I want to grow higher quality buds? Or, do I want the greatest yield?".
Note: this is in no way trashing the quality of buds from HPS at all. It is just my humble opinion that the buds from my LEDs are better quality medication.
Everyone can say HPS is better, or LED is better. But, the fact is that you have to pick the right light for you. The right light for your growing space?
It never hurts to go outside the box and try new things... You'll always learn something.
In a 5X5 you could certainly run both the LED and HPS and see a side by side grow. Then, decide what is best for you.
Happy growing!
I'd love to hear how it works out!