OK Tor, here are a few photos showing a few different mounting arrangements on two different bikes with those Cold Springs front and rear racks:






The lights are completely waterproof so there's no issues sticking them under the rack, and it has the added advantage of both protecting them in the event of a crash as well as eliminating any potential interference issues with the panniers. Mounting was pretty straight forward. The SS U-bracket was tossed and the lights bolted directly through the alloy mount to the rack strut. No holes to drill - just a rubber standoff on each side to space the light away from the rack.

The amber lights, as noted in the post below, have the same visual presence as the main helmet light when viewed at anything outside a 15 degree angle from head-on. Elliptical beams have that advantage. The color will definitely be more visible in the winter, and independent testing by a number of sources has indicated that there is no advantage to running anything as bright as a 10 watt light during the day.



In this photo the lights were temporarily mounted on the forks with some Manfrotto NanoClamps just for testing. The least complicated way to attach these is actually just to clip them below any white lights already on the bike. They're a bit like Lego.