The expensive one is the white-ish one all the way on the left! That one is made of titanium (with the exception of the copper head). All the other lights are made of aluminum. Also, the cerakote coating is special because it changes color with heat! At rest it's a dark navy blue, but as it gets warmer it turns into the greyish white you see in the picture :)

The special thing about each of these lights is that they're almost semi-custom made, you get to pick certain things such as the color and material of the body, the actual length of the battery tube for different types of cells, and most specifically the type of LED that gets put inside. They also use an open-source and insanely complicated user interface called Anduril 2.0.

The fancy colors you see the lights putting out in the image are just auxiliary LEDs that look pretty. You can change what color they're producing or even have em do a little light show if you set them to do that.

There's one guy who actually makes them, his name is Hank Wang. You can find his store at intl-outdoor.com. Considering the amount of customization that goes into these lights and the quality of the LEDs themselves, the value of them is actually rather amazing.

In this image you can see how the beams vary in color temperature across these lights.