So far, it seems to be working very well. I've noticed folks staying further back from me at stops. I'm going to chalk this one up as a good investment and addition to the truck.
In addition, I didn't mention this in my earlier post, but I did do a slight modification to the Safty-Lite. Instead of the single 1156 bulb that it came with, I have installed 60 leds (6 strips with 10 leds apiece) to get more even and brighter illumination. The strips I used are made by Alpena, and are very bright. The strip under the tailgate is also made by Alpena. If anyone is interested to see how it's setup, I can pull the cover and lens and get a pic or two of it.