Definitely an easier approach, and gets all the bits and pieces you may miss. What I like about where Gary is going, if he feels up to it, is it could evolve to where you could basically do a build on paper combining standard and LED bulbs to see how much power you need, say to size an alternator or something. Granted, going for the largest you can fit generally solves that problem without playing around.What I had in mind was something like this, which started life as a page from the 1981 owner's manual. So, as I fill in the wattage behind the spreadsheet will automagically have the calcs. Then I add it to the above-mentioned page, and y'all can play.