Halo and Demon Eye Guide
Halos are rings of light that sit in the back of the shroud and/or around the opening of the shroud.
Rear Vs Front Halos
Rear halos sit in the back of the shroud and create the backlit effect, shown below. The Turbine and Panamera shrouds require a rear halo.
Front halos sit on the opening of the shroud. These are the only options in mini shrouds and can be added to any full size shroud.
Front Halo Only
Front and Rear Halo
Switchback vs RGBW
The standard add on for halos is switchback halos. They will light up white and amber, like the pictures above. It has the ability to function as a turn signal if wired that way.
The RGBW Upgrade for halos makes them full color changing. It is Bluetooth controlled and has 120 different show modes, as well as a ton of solid colors, including white and amber.
These halos do not have the ability to function as turn signals.
Demon eyes back light the projector itself. The term demon eye comes from the red backlit option, but they are available in red, blue, green, white, and purple as singe colors. If you add on the RGBW upgrade, the demon eye can be full color changing along with your halos. These are great for adding a little extra customization, especially for builds like the 06-09 4Runner, 14+ 4Runner, Gx470, and 16+ Tacoma where a shroud and rear halos is not possible.
An example of demon eyes in action is shown below on @fj_thom's rig