I'm using a Hella Marine 2 NM NaviLED PRO Stern Navigation Lamp on the stern. (Order info here: http://search.defender.com/?expression=700834&x=0&y=0, datasheet here: http://www.defender.com/pdf/NaviLED_...tion_Sheet.pdf).
The blue line is my pendant that I use to haul the anchor rode to the bow while I toss it over from the cockpit. Full details are here: http://www.pearsonariel.org/discussi...6711#post26711. And yes, as you surmised, the red line is my jib douser.
Note that Rule 22 of the COLREGs requires that the minimum visibility of the stern light for a vessel less than 12 meters (I count an Ariel as being 8 meters) is 2 NM. That minimum is met with the light above. The sidelights (red and green) only need to be 1 NM to satisfy the COLREGs, but I opted for 2 NM lights. I reason that, considering how little power the LEDs draw, there's not much gained by using less-intense lights.