Now, when did Merrie suddenly become six years old? That's what she looks like in panel 3 (panel 1 if your dead-tree version leaves out the intro), and she's talking coherently.
Mike and Dee have two analog clocks? Well, the second one looks like an antique.
Now, strictly speaking, we're not saving light; we're redistributing the hours. But Mike's non-listening response is necessary to set up that glurgey last panel. I do have to admit, it's charming; it could be on a Christian greeting card. Little girl in rainbow colors, looking up at a Jacob's Ladder and trying to catch it in a jar, with her blue teddy bear slumped on the floor next to her. All together now: "AWWWWWWWWW!"