You know, Marv, this is the very reason I don't like front squats for so called recovery or light days. Think about why in the world should you ever fail to meet reps on a squat that is supposed to be light and "refreshing"
. Or, in other words help you recover. I actually disagree with Rip and many others about the only concideration being pure weight on the bar. Anything that has you failing can't be helping you recover and could be introducing more fatigue. It's obviously intense by any definition of the word and even when people don't fail they still end up using a weight that has a lot of "intensiveness" because of the exercise itself.
It doesn't matter how you were feeling there is no reason to ever have trouble with those squats on Wednesday. You should either lighten up the front squats are just use 80% of whatever you use on Monday's reg squats, which is a much more fool-proof method.