Although it increases the cost of the cameras, I've found that black-flash flash extenders definitely solve the lack of illumination common to black-flash cams. I'm now using the black-flash flash extenders made by Uway, and dang those things light up the night!

Of course, that also means you have two boxes strapped to the tree, two cable-locks for each set-up, two sets of batteries to buy, and more initial cost. But for getting pictures in food plots at night with black-flash, those flash extenders are the cat's meow.
"Know where you stand, and stand there" --Jesuit Father Daniel Berrigan

"There is no reasoning someone out of a position he has not reasoned himself into." --Clive James