My mistake but it also says that only 10 lots are avaliable so when they run out, who knows how much more they would cost, especially if there is a sudden demand for them. The other issue with them as RJ mentioned, they need 35V or less so a power supply of some type will still be needed on top of these. I have yet to find a DC power supply that can give more bang for the buck than a PC power supply. Even AC landcape transformers cost more and give much less.