If you idle a lot or run at slow RPM a good part of the time yet your calculated excess wattage looks good, order the next lesser wattage that your system can handle. Besides my HD I have a Triumph I use for endurance rallies. This might sound like - I have a bridge for sale, but its true. The left one is aimed straight ahead, the right slightly to the right to better see Deer, etc. You will light up a farther distance ahead with a narrower width beam with spots than floods of the same wattage.
Floods are great around town.
There are a number of ways depending on your objective. BUT theres no guarantee on the chrome as the lights generate a lot of heat.