Open or enclosed CMH fixtures?

They're the same price, and on sale at home depot right now. I'm thinking about buying 4, but have no idea which ones I should get.

Link to product would help.
Vertical or Horizontal?
Philips bulb included?
Remote ballast?

p/Hydro-Crunch-315-Watt-Ceramic-Metal-Halide-CMH-Enclosed-Style-Grow-Light-System-CMH02-315-ROPE/305304207

No bulb, I think I'll just grab an ipower one once the amazon strike is over.

/p/Hydro-Crunch-315-Watt-Ceramic-Metal-Halide-CMH-Open-Style-Grow-Light-System-CMH01-315-ROPE/302785610

Leaning towards this second open one, but freaking out because the sale ends tonight lol. Need another like before I can post links lol.

Those are for the home depot website

Of those above, most use the enclosed style reflector.

Not selling anything or raining on your parade, just an FYI.
As an example, these include the Philips bulb, separate ballast can be remote mounted.
Best of all 3-year warranty. Probably better support/response than Homeydepot. (bulb bad on delivery, ballast quits)
https://growershouse.com/ceramic-mh-315w-low-profile-stealth-package

Best of luck on your grows.

What do you mean? I meant to link to an open and an enclosed, but the links didn't quite work.

What about bulbs? 3 or 4K?

https://www.homedepot.com/p/Hydro-Crunch-315-Watt-Ceramic-Metal-Halide-CMH-Enclosed-Style-Grow-Light-System-CMH02-315-ROPE/305304207

Best for someone more experienced than myself to help out with bulb k. (3k, 4k, or mixed)
I'm running one of each over a 4x4.

https://www.homedepot.com/p/Hydro-Crunch-315-Watt-Ceramic-Metal-Halide-CMH-Open-Style-Grow-Light-System-CMH01-315-ROPE/302785610

This is the one I'm looking at, but it seems identical to the closed one.