The problem is the reflector. Reflectors in lighting systems are designed for the shape of the bulb.Cop_Stanger said:New headlights are brighter cause their new. The new headlights from HD however I don't think are better than the old style of fluted lense lights. On my '03 Sportster I changed to the new style of light and it then had a dark spot in the middle of the pattern. That problem continues with my '05 Night Train.