Stella Blue has an ACR remote control spotlight.
They use a halogen bulb that tends to burn out rather quickly.
The cost for the originals can go as high as $90.00 in some stores. Online you can find them as low as $40.00 each or less. A better alternative is a Xenon bulb. They last longer, burn cooler and they can be had for less than $20.00.
They are available at http://www.replacementlightbulbs.com/lampjcs12v55wg635.html