5K or 5500 (White/White) will give the best definition and image for your eyes to see detail. Fan or Fanless depending on what fits. For Ski Doo H4 this is the highest ouput and has no fan: https://www.racesportinc.com/rsh4ledhl.html
Most 12V headlight circuits are made to flow 5 amps of current or 60 watts. This matches the halogen OEM bulb. A properly designed and manufactured LED will draw less than 60W for each bulb system, freeing up some current for other purposes. Be cautious of the cheap stuff out there in the Wild Wild west of lighting products.