A pic of your items on a bread board, before going into production, is in order. Sounds like fun.
You will be for sure pushing some heat when you get even 26 amps at close to 36V with those LED's. And those lights will be burning quit bright too, at that amperag and voltage. 36V forward voltage is the goal with those LED's, varying the amperage at 36V input affects the brightness and heat the most. In a basic 3.6 to 4V Led, 700 milliamps is a good balance of power input to light output, for longevity. For additional brightness, with a significant gain in heat output, and heat sinking necessary, 1,000 Milliamps is quite good. The amount of lumens gained per increase in MAh, past 1000 is a trade off of being over driven, creating lots of heat, and shortening of life, for not that much gain in lumens, for current expended.
This was true around 2009- 2010 when I was dinking around with lights for riding mountain bikes at night on single track, trying for 600-700 lumens out of a single die LED. YMMV with increases in performance of LED chips 5 years later.