As long as the light is designed to use 18650s, the brand of the cell will not matter. Just as long as its a quality cell which Streamlights (from what I have heard anyway) usually are there shouldnt be any problems. Honestly I would do it without thinking twice about it. I personally would use either Panasonic or Nitecore brands. From what I see, the TN12 is a 18650 light, also designed to use two CR123s. There will be no issue using the Streamlight 18650.
Thank you for replying .