 Lowering that temperature, a properly ventilated attic when it's 90 degrees out still can be 110 degrees, which ain't bad at all. It's a whole lot better than 140. And you wonder why those upstairs bedrooms aren't real comfortable? Yep, that's one of the reasons. Like right on the other side of that drywall, there's a little insulation, but you got a lot, lot of heat up there. That heat can come in through the can lights.