Same boat as you, UN55JS8500 and left side insane light bleed. Starting on the right side now as well because the sides of the TV get so hot.. This is clearly a defect and we should be reimbursed or have our ~3yr old "SUHD" TVs repaired because $2K should last more than 3yrs of use..
I'm sorry that you are experiencing this. Can you send me a private message with your model and serial number? http://bit.ly/2tCGnGK