GideonTech.com posted a review on the A.C.Ryan - Blackfire Fans / Fan Grills

All of the fans are made from UV reactive Acrylic and have 4 UV LED to light up the fans. One of the features of these fans are that they can be used without having to power the UV LEDs. This configuration means that there are two power rails coming off the fans; one to power the fans and a small pig tail which connects to the LED rail to save you from having to use an additional molex.

A.C.Ryan - Blackfire Fans / Fan Grills Review