I recently purchased a DDR arcade cabinet that had two non-DDR spotlights that were missing bulbs of an unknown type. The manual calls for 12v 20-35w bulbs and I liked the feel of incandescent bulbs, hence designing these brackets that allow me to convert to H11 auto bulbs. The two actual DDR spotlights both had burnt bulbs, so I decied to convert those to H11 to keep all the bulbs the same.
The auto bulbs are designed to reflect light backwards. So I used some tin foil to reflect it back forwards. Two designs of each bracket type are included: one with a reflection dish and one with out. The "L" bracket is for the unknown spotlights. The other is for DDR spotlights.
I was able to find bulbs for $1 /each at my local junk yard. Use this to know what vehicles have the bulbs: http://websites.retailcatalog.us/1424/mm/master-bulb-guide.pdf
"Keep on dancing if the lights keep flashing!" - Icky Blossoms (Heat Lightning)