This is the replacement bulb for all 35W ECO Spots manufactured until February 2012. Later units use a 15 degree version of the same bulb. ECO Spots that utilize the new 15 degree bulb have a yellow warning label.
Philips MASTERColour CDM-Rm Mini Elite35W/930 GX10 10D
Other product name: MC CDM-Rm Mini Elite 35W/930 GX10 10D