Originally Posted by NumbersGuy

I completely agree. I purchased both the Garmin UT800 headlight and the Varia RTL510 Radar Taillight about a year ago and have been highly impressed with the combination. The RTL510 can be found for $150 which, while expensive does provide the radar functionality which I have found to be extremely valuable. It's worth the premium to have this functionality in addition to being a taillight. Plus if you already have the UT800 and have linked it to a garmin head unit, the Radar Taillight will integrate into the lighting network and automatically adjust to conditions, one adjustment being an increase in brightness and flashing as a vehicle approaches, further improving visibility to those drivers. I believe this is a great safety feature, which hopefully would be a good way to convince your wife it's worth it for your increased safety.