I know there's been some recent discussion of night flights for recreational pilots, and what I've understood is that it can be done if using a 3SM visible strobe. I'm probably wrong on this, but didn't at one time at least, the rules say that you could only fly for 20 minutes after civilian twilight? Did that change at some point, or does it mean that is the case "unless" you have the strobe? Just somehow missed the change if that was the case and was wondering. Thanks Ladies and Gentlemen.