I received my first item from a manufacturer for real-world product testing and review. Bike Brightz sent me a few samples (red, green, yellow, and blue) of their flashing LED lights to test out with the kids and on my commuter bike.
They are able to be zip-tied to the bicycle frame, such as the down tube or chain stays, and run off of two AAA batteries (included). The lights are activated by button and have a steady or a variety of flashing modes (generally varies by speed of the flashing). The affect appears to be similar to the Down Low Glow but for a lot less coin (BBz are about $20 + shipping). I am not certain whether the Bike Brightz offers the same level of lighting as the DLG, since I don't have any for side-by-side comparison. Plus, the installation is super easy and easy to transfer to a different bike, since re-usable zip ties are provided with the Bike Brightz kits. Note: I have not used the DTG lights but have only checked out other web pages about them.
I will post pics (day and night) from my kids' bikes and my commuter soon and give a fuller review after I have a few commutes (including some rain commute days to test for water resistance) with them installed.
Disclaimer: these products were provided to me from the Bike Brightz company for testing and review at no cost to me.