It's a EFG316K. The 48 volt headlights don't last long ever since it was new, 3 years ago. I thought is due to going over the dock plate fast but the sister machine, which is a EFG318K, has never had a headlight problem. The wiring and switch is OEM, it came with regular 4" round type lights. I have tried the standard round type and "off road" square halogen type lights. It seems a voltage spike is blowing them. Any ideas on how to cure this problem. Thanks.