If there's a fire due to my grow equipment inside or outside the growroom I don't care about my crops. Lol I just want it out. I can always get clones and start over no real big deal. I think I'm going to have to invest in one of those
Of course stopping the fire would be the number one concern, it just seemed to me that it would be wasteful and foolish to have a flame defender inside of a grow tent or grow box, and have the ballasts be outside of tent/box, so that if the ballasts caught fire, it would have to burn enough to raise the temperature inside the tent, coating everything inside your tent with carbon dioxide or foam, and maybe still not hitting the area outside of the tent that is on fire.
If you had one placed above the stuff most likely to cause fire (ballasts in my opinion, but still unlikely), and have it situated in one area, you could save your grow and have no loss of crop or a huge mess inside your tent. You could also have 2 and have one inside your tent just in case, but as I said before, I can't really imagine a scenario where a sealed, air-cooled hood could cause a fire. Anyways, let us know how you like it when you get one.