Have a 52 model International which I've owned since '74. Converted it to 12 volts shortly after purchasing same and headlights are 6012 dual beams and puny, especially at my advanced age. Looking for a brighter 'drop in ' bulb and AM NOT interested in LED's or H4's as conversion is not on my list. I do have a relay and the wiring is , of course, oversize as the system began life as 6 volt. I'm thinking 6024's but, which ones? Are some better than others? Suggestions???