I dont know what the model is mate it has 2 bulbs one a small one for seeing fences and that and then it has a proper beam.
I can have a look see if it has a make.
Try when he sees another dog just pull the lead say no if it dont work give him a dig with your foot on his chest not massive just a knock to make him put his attention on you.. Or something else so he pays more attention to you maybe learn him to fetch and give him a ball
Just had a walk out with my bitch, surprising she was flying in and out bushes and flew down a hole she hasnt been out for a couple of weeks due to work commitments but never stood still, It's good to see..