Hi, I'm looking to light up a background enough behind the subject to create the effects seen in the linked photos.

Here's what I have for lighting now:

2 Impact Octa boxes - florescent light - no grids, just defused
1 26" Westcott Rapid box
2 Canon 600EX-RTs

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I'm wondering if a Cowboy Studio 22" beauty dish and grid would have that affect?