Mikhailtech has posted a Xoxide 80mm UV LED Fans review

As you can probably guess the LEDs are mounted in pre-drilled holes around the casing. This is optimal placement as it doesn't take up any extra space (unlike cold cathodes mounted on fans). Aside from being glued into the case from the outside, they (along with the wires) are also secured by a piece of clear tape, possibly to prevent shortage. Unlike Antec's original fans, however, the wires for the lights don't come from the main power lead. Instead, each LED has its own connection on the motor PCB. However it still seems like they're wired in series, so if one stops working the rest will shut off as well.

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