For $125.00 you think the would include the pot so you can dim the thing. However you can get a POT at radio shack for super cheap. I think I have a few if you want one, you'll just need to find a knob for it.
Plus I just read you will need a separate power source to run the POT, so you will really end up spending about $150 bucks plus shipping.
All in all nice kit wish they had them stream lined like this when I got my lights for my BC29.