See the following PDF page. The snap-in panel mount with wire leads are great and some are avialble with built in resistors. The flashing ones are self regulating and make great warning indicators. http://dkc3.digikey.com/pdf/T041/1287.pdf Jim ===== James F. Agnew Jim_Agnew_2@Yahoo.Com Tampa, FL Velocity 173 Elite Aircraft Completed & Flying