Setting up 315w cmh grow

So decided to expand my hobby a bit this winter and want to put together an indoor 315w grow. From what I understand it’s a good way to get a decent yield in a footprint of 3.5x3.5’ or so.

https://www.amazon.ca/dp/B075ZLXB5D/ref=sspa_dk_hqp_detail_aax_0?psc=1

This is the sort of light I’m interested in. I want to get the parts together over the next 6 weeks or so.

Does anyone have experience with sunstream lights? I have read vertical presentation is better then horizontal?

I would say 3 x 3 footprint for the 315, beyond that it's really pushing it.

I am not a fan of lights that have the ballast built into the reflector. I would prefer to put my ballast outside of the tent for heat purposes. You also want a square wave ballast from what I have been told they perform better.

What Renfro said.

Example...
https://growershouse.com/ceramic-mh-315w-cmh-optimum-performance-package

3x3 is pushing it with a 315. I had two 315s in a 3x4.

These are exactly the replies I am looking for, thanks for the tip about the ballast renfro.

I asked at my local grow store they said I should get a 4x4 tent for the extra room even though a 315 has a smaller effective footprint. Do you loose efficiency if the walls are not up against the effective area?

Example 3x3 tray in 3.7x3.7 box.
Good advice from gro shop.
Then you can add second cmh later.

I pulled the trigger on this setup.

Sunsystems 315
Mammoth 120 pro tent
6” outtake fan + temp controller
2 clip fans

Pick it up in a couple weeks. Thanks for the reply’s