I am looking for a light that has a side switch and I would like a usable low output and have it down to these 2 lights...Sunwayman T20CS or Fenix TK21. Can anyone give me any pros and cons of these 2 lights or maybe someone who owns both could chime in? High output on the Sunwayman is 658 and low is 18 lumens Fenix is 449/4. Thanks for the help!