One good safety idea for hunting dog at night is to attach a tip up light to their hunting vest. A tip up light is generally used on ice fishing tip ups, so when its dark you can see the flag pop up. But this light (purchased anywhere they sell fishing gear or online), can be clipped to your dog and so that you can see her in the dark in any situation.
During ice fishing, I put an orange neoprene vest on my springer spaniel to keep her warm and to make sure she is visible to cars driving across the ice. At night, she enjoys walking around near the ice shanty, but I am concerned that snowmobiles and trucks might not see her, so I attached a tip up light with alligator clips to the back of the vest. It glows very bright and she can be seen in the darkest of nights.