I did a fair amount of research on the subject and finally decided on the P3's from Skene Designs. I checked out the Hyperlights but found the P3's to be significantly brighter but more pricey at $150.00. Well worth it to me. P3's have longer light bars with a few more led bulbs, hence brighter.
They function as brake lights as well as tail lights and also have a few different hazard light options. For a few extra bucks you can get the "voltmeter" option which allows you to check battery voltage before engine start up through a series of light flashes indicating pre-start up voltage.
The brake lights have several flash mode options that light before going to solid lights. I like the four slow flashes before going solid. I checked the brake light brightness at night and they were so bright I could barely make out my license plate number! Love that.
A real attention getter I'd think. The tail light has two modes: solid or slightly modulated continuously, I like the modulated because it gets noticed more IMO.
I did have a problem with the little black box that controls the lights, it wouldn't turn the lights on
. So I emailed Skene Designs and he sent me out a new upgraded light set with the "voltage meter" option at no charge with a prepaid shipping label to return the old box, for my inconvenience. Again, quick shipping in two days. Very good service!
I have had them installed for three weeks and love them. The attached picture shows my wee in tail light mode. If you want to see a video of them in action here's someone's youtube link that shows all the functions:
'07 DL650, Madstad windshield mount, Garmin Zumo 450 GPS, Givi V46 trunk box, Cortech tank and tail bag, Caribou side boxes, Rick's fork brace, Hepco Becker crash bars. P3 led brake/tail lights, Acerbis Multi-Touring handguards, Eastern Beaver Strom Powerlet kit...better suspension pending.