Thanks for a message, I did reply to you already in private but will post it also here for others:
So if it comes to 3XPG - light has wider hot spot and also light spill (the area of light beyond the hot spot) what it means is that you will see more around of you but the light wave would not travel as far as narrower beam because puts out less lumen per taken area (sq inch etc, lighten up area is bigger but less power per sq inch ) so accordingly when used in bad viz you will see more of a thing that disturb that vis (sand, green stuff etc) closer to you because the way it work with that light beam angle
- BACK Up TEC has narrower light beam thats why you will see less in area around of you but because of more lumen per sq inch the light (hot spot) will travel much farther then 3XPG beam
and again in bad vis you see less disturbing substance so might look like it works better then other in low viz
Because of the very compact size of our Back Up's that's very good idea (well known in DIR configuration) of having two back up lights like you're planning to use. It's a great option.
So in your case having two different models one is going to be better then another depends on the conditions.
Light For Me is working at focusable LED Back Up's but so far the prototypes that were made for testing came up ok but weren't the ones that we would like to show the world, not only because of our work but there is no perfect LED's yet produced by LED's company for that purpose (in our ideology) (we use CREE, American Company - the most innovative). So it might take another year or so to make them address every need we have.
Hope that helps little bit in your concern
Sebastian
