I have a Yukon Patrol-D 3x42 and also a Yukon Patrol 2x24. Basically the same units but the 3x42 has a zoom lense which clips onto the 2x24 model. I bought these models because they were cheap and use AAA's (which last forever). They are Gen1 nightvision scopes. I use them for security around home and camping, I gifted the 2x24 to my brother in-law for his birthday. I can navigate in complete darkness, but they're not too crash hot at extreme close range such as looking down at your feet to see where your feet are stepping in complete darkness as they have a very wide viewing angle. I generally use a tactical torch with firefly mode for this. I always use the built-in IR led, they don't see much without it.
They arent the crispest of images but I have successfully, on more than one occasion, tracked/followed subjects in the front of my property in complete darkness. These were just teenagers and/or kids but the dogs went off so I normally grab my scope and tactical torch and head out the back door to make my way round the property to see what's upsetting the dogs. I've been able to walk right up to within 3 metres of subjects in complete darkness and ask them what they're doing
you should see them run when a voice appears in the complete darkness! I have also viewed kangaroos, wallabies, potaroos, bandicoots, possums, sugar gliders, snakes, owls etc with the scope in my backyard from the back deck, it doesn't disturb the animals as much as a bright torch.
They have an ir led which glows a dim red but can only be seen when looking directly at the scope, the slightest angle and you can't see the ir so it's still very discreet when in use. Gen 3 nightvision doesn't need ir's but they're $5k.
It uses a phosphorous sight tube that amplifies light. These fade over time so it's best not to look at bright lights and to keep the lense cap on at all times other than when in the dark. Even when you turn off the scope, the phosphorous tube glows for ages so you can still use it.
I also used it camping up the beach, looking out at the horizon it illuminates lights from boats you can't see with the naked eye.
Hope this helped.