Psihoops now uses over 50 different kinds of LEDs and half a dozen kinds of tubing. You will find more information about these on the purchase page links. Below are some examples of early psihoops. You could still have your hoop made to these specs by ordering, for example, all dragonfly LEDs.
Mixing types of LEDs is useful for contrast and variety, and does not cost extra. Price is determined by total number of LEDs and number of circuits.